Zahlenwerte und Funktionen aus Naturwissenschaften und Technik Neue Serie: Group IV, Physical Chemistry ; vol. 20, Vapor pressure of chemicals ; subvol. C, Vapor pressure and Antoine constants for nitrogen containing organic compounds, Volume 4; Volume

Landolt-Börnstein Numerical Data and Functional Relationships in Science and Technology New Series / Editor in Chief: W. Martienssen

Group IV: Physical Chemistry Volume 20

Vapor Pressure of Chemicals Subvolume C Vapor Pressure and Antoine Constants for Nitrogen Containing Organic Compounds

J. Dykyj, J. Svoboda, R.C. Wilhoit, M. Frenkel, K.R. Hall

Edited by K.R. Hall

13

ISSN 1615-2018 (Physical Chemistry) ISBN 3-540-41060-0 Springer-Verlag Berlin Heidelberg New York

Library of Congress Cataloging in Publication Data Zahlenwerte und Funktionen aus Naturwissenschaften und Technik, Neue Serie Editor in Chief: W. Martienssen Vol. IV/20C: Editor: K.R. Hall At head of title: Landolt-Börnstein. Added t.p.: Numerical data and functional relationships in science and technology. Tables chiefly in English. Intended to supersede the Physikalisch-chemische Tabellen by H. Landolt and R. Börnstein of which the 6th ed. began publication in 1950 under title: Zahlenwerte und Funktionen aus Physik, Chemie, Astronomie, Geophysik und Technik. Vols. published after v. 1 of group I have imprint: Berlin, New York, Springer-Verlag Includes bibliographies. 1. Physics--Tables. 2. Chemistry--Tables. 3. Engineering--Tables. I. Börnstein, R. (Richard), 1852-1913. II. Landolt, H. (Hans), 1831-1910. III. Physikalisch-chemische Tabellen. IV. Title: Numerical data and functional relationships in science and technology. QC61.23 502'.12 62-53136 This work is subject to copyright. All rights are reserved, whether the whole or part of the material is concerned, specifically the rights of translation, reprinting, reuse of illustrations, recitation, broadcasting, reproduction on microfilm or in other ways, and storage in data banks. Duplication of this publication or parts thereof is permitted only under the provisions of the German Copyright Law of September 9, 1965, in its current version, and permission for use must always be obtained from Springer-Verlag. Violations are liable for prosecution act under German Copyright Law. Springer-Verlag Berlin Heidelberg New York a member of BertelsmannSpringer Science+Business Media GmbH © Springer-Verlag Berlin Heidelberg 2001 Printed in Germany The use of general descriptive names, registered names, trademarks, etc. in this publication does not imply, even in the absence of a specific statement, that such names are exempt from the relevant protective laws and regulations and therefore free for general use. Product Liability: The data and other information in this handbook have been carefully extracted and evaluated by experts from the original literature. Furthermore, they have been checked for correctness by authors and the editorial staff before printing. Nevertheless, the publisher can give no guarantee for the correctness of the data and information provided. In any individual case of application, the respective user must check the correctness by consulting other relevant sources of information. Cover layout: Erich Kirchner, Heidelberg Typesetting: Authors and Redaktion Landolt-Börnstein, Darmstadt Printing: Computer to plate, Mercedes-Druck, Berlin Binding: Lüderitz & Bauer, Berlin SPIN: 10688591

63/3020 - 5 4 3 2 1 0 – Printed on acid-free paper

Editor K.R. Hall Thermodynamics Research Center TheTexas A&M University System College Station, Texas 77843-3111, USA

Authors J. Dykyj J. Svoboda R.C. Wilhoit M. Frenkel K.R. Hall Thermodynamics Research Center TheTexas A&M University System College Station, Texas 77843-3111, USA

Landolt-Börnstein Editorial Office Gagernstr. 8, D-64283 Darmstadt, Germany fax: +49 (6151) 171760 e-mail: [email protected] Internet http://science.springer.de/newmedia/laboe/lbhome.htm Helpdesk e-mail: [email protected]

Preface The thermodynamic properties of fluids are vital information for design, operation (including safety considerations) and maintenance in the fluid processing or continuous manufacturing industries. Among the thermodynamic properties, some are more important and pervasive with vapor pressure being possibly the most important of all. Practical handling of any fluid requires knowledge of its vapor pressure, and vapor pressure (or boiling point) is invariably among the first properties measured for any substance. Chemists and chemical engineers are the primary people who need these data. Traditionally, these professionals have populated the petrochemical industries and have driven it to unparalleled levels of efficiency and productivity. However, these same professionals recently have migrated into other fields, such as: electronic materials, pharmaceuticals, environmental professions, food processing, and biotechnology. They bring with them their skills and knowledge of continuous processing and their consequent need for thermodynamic properties, such as vapor pressure. In addition, the faculty and students of academia need this information to prepare those who would enter the fluid processing industries. The Thermodynamics Research Center at Texas A&M University (TRC) has assembled, collected, evaluated and published tables of thermodynamic data for nearly 60 years. These current volumes describing vapor pressures come from those tables and other evaluation projects conducted by TRC and other research groups, and, as of the publication date, represent all known, evaluated data. The volumes contain constants derived from fitting experimental data with the Antoine and extended Antoine vapor pressure equations. The condensed phases can be either liquid or crystal. Thus, these constants provide evaluated vapor pressures which professional thermodynamicists believe represent the data within experimental error. The subvolume IV/20A covers hydrocarbons and organic chemicals containing S, Se, Te as well as halohydrocarbons, total of 4252 compounds. The subvolume IV/20B covers oxygen containing organic chemicals, total of 3174 compounds including so vitally important classes of organic compounds as alcohols, ketones, aldehydes, acids, ethers and esters. The present subvolume IV/20C covers nitrogen containing organic chemicals, total of 1575 compounds including so vitally important classes of organic compounds as amines, amides, nitriles, and nitrates. While the parameters presented in this series only describe pure compounds, the vapor pressures of pure compounds are essential for describing the phase behavior of mixtures accurately. The simplest equation for describing the phase behavior of mixtures is Raoult’s Law which states that the mole fraction of a component in an equilibrium vapor mixture multiplied by the total pressure equals the mole fraction of that component in the equilibrium liquid mixture multiplied by the vapor pressure. More accurate equations append correction terms to each side of this equation. Because these volumes present vapor pressures for such a wide variety of organic compounds, they should be of value to professionals in a wide variety of commercial and academic activities. Because they have been evaluated, those who would use these values are freed from the necessity of selecting from among various sets of data. College Station, Texas, November 2000

The Editor

Acknowledgements The authors express their sincere thanks to members of the staff of the Thermodynamics Research Center, part of the Chemical Engineering Division of the Texas Engineering Experiment Station within the Texas A&M University System. Our special thanks to James Carruth for his assistance in data collection and entry.

Contents IV/20 Vapor Pressure of Chemicals Subvolume C Vapor Pressure and Antoine Constants for Nitrogen Containing Organic Compounds 1 1.1 1.2 1.2.1 1.2.1.1 1.2.1.2 1.2.1.3 1.2.2 1.2.2.1 1.2.2.2 1.2.3 1.2.3.1 1.2.3.2 1.2.4 1.3 1.3.1 1.3.2 1.4 1.5

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . Measurement of Vapor Pressure and Boiling (or Sublimation) Point Static Techniques . . . . . . . . . . . . . . . . . . . . . . . . . Direct Sealed Container . . . . . . . . . . . . . . . . . . . . . . The Isoteniscope. . . . . . . . . . . . . . . . . . . . . . . . . . The Inclined Piston Gage . . . . . . . . . . . . . . . . . . . . . Quasistatic Techniques . . . . . . . . . . . . . . . . . . . . . . Ebulliometric Techniques . . . . . . . . . . . . . . . . . . . . . Transpiration Technique . . . . . . . . . . . . . . . . . . . . . . Kinetic Methods . . . . . . . . . . . . . . . . . . . . . . . . . . Knudsen Effusion Method . . . . . . . . . . . . . . . . . . . . . Langmuir Method . . . . . . . . . . . . . . . . . . . . . . . . . Measurement of Critical Constants . . . . . . . . . . . . . . . . . Mathematical Representation of Vapor Pressure . . . . . . . . . . Thermodynamic Relationships . . . . . . . . . . . . . . . . . . . Empirical Vapor Pressure Equations . . . . . . . . . . . . . . . . Description of the Tables . . . . . . . . . . . . . . . . . . . . . References for 1 . . . . . . . . . . . . . . . . . . . . . . . . . .

2

Tabulated Data on Vapor Pressure of Nitrogen Containing Organic Compounds Some Inorganic Compounds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Organic Compounds, C1 – C84 . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Notes

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

References

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chemical Name Index

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chemical Abstracts Service Registry Number (CASRN) Index

. . . . . . . . . . . . . . . . .

. . .

1 1 2 3 3 3 3 3 3 4 4 4 5 5 6 6 7 10 12 14 14 16 123 125 139 189

Ref. p. 12]

1 Introduction

1

1 Introduction

1.1 Definitions Equilibrium intensive thermodynamic properties of pure compounds that exist as a single phase, e.g. crystal (solid), liquid or gas, are functions of two independent observables. Temperature and pressure are usually the selected variables, although other pairs may be used. Properties of pure compounds that exist as two phases in equilibrium are functions of one independent variable. Either temperature or pressure may be chosen as the independent variable. If one of the phases is condensed (solid or liquid) and the other phase is gas (vapor) and temperature is the independent variable, the pressure is the vapor pressure. The vapor pressure is a function only of temperature, and it is independent of the volume of the system or of the amounts of phases present. If pressure is the independent variable, the temperature is the boiling point. Therefore, the boiling point is a function only of pressure applied to the system and is independent of the total volume or of the amounts of the two phases present The terms vapor pressure and boiling point of a pure component are two equivalent ways of referring to the same physical state. When the condensed phase is a solid the term sublimation point is usually used instead of boiling point. The boiling (or sublimation) point at one atmosphere is the normal boiling (sublimation) point. Reciprocal temperature in thermodynamics is the integrating factor for reversible energy transfer as heat. Two kinds of temperature exist: thermodynamic temperature that is independent of any particular physical system and defined within the Second Law of Thermodynamics and the practical temperature scale used with thermometers. The International Committee on Weights and Measures establishes this scale and keeps it as consistent as possible with the thermodynamic temperature. The ITS (International Temperature Scale) is revised every 20 years (most recently in 1990). Temperatures measured on this scale are designated ITS-90. The size of the degree on this scale is determined by the convention that the triple point of water is exactly 273.16 K on the ITS-90 scale. The rest of the scale is defined in terms of 18 fixed points consisting of melting and boiling points of specified substances. Exact temperatures are assigned to these points. Interpolation between points is made by a series of standard thermometers whose construction is specified in the definition of ITS-90 [90-its] Pressure is the force per unit area acting perpendicular to a surface. The unit of pressure in the SI system of units is Newtons per square meter. This unit is also called the Pascal and abbreviated as Pa. Another unit frequently encountered in practice is the torr. This unit corresponds to a millimeter of mercury in a standard barometer. The standard barometer is a glass tube filled with mercury connected to vacuum on one side and to the measured pressure on the other. The mercury is at 0 oC in a location having gravity corresponding to the standard gravitational acceleration, g = 9.807 m⋅s–2. One atmosphere (1 atm) is 760 torr exactly, which corresponds to 101325 Pa. The highest temperature at which a liquid can exist in equilibrium with its vapor is the critical temperature. Above this temperature liquid and vapor do not exist as separate phases. Thus, a substance does not have a vapor pressure (or boiling point) above its critical temperature. The pressure exerted by a substance at its critical temperature is its critical pressure and the density in this state is the critical density. Critical constants are significant not only because they provide the upper limit of vapor pressure,

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1 Introduction

[Ref. p. 12

but also because of their theoretical implications, their use in developing equations of state and the role they play in many physicochemical correlations. A recent compilation of recommended critical constants is being published as a series [95-ambyou, 95-ambtso, 95-tsoamb, 95-gudtej, 96-dau].

1.2 Measurement of Vapor Pressure and Boiling (or Sublimation) Point The experimental determination of a vapor pressure or boiling (sublimation) point for a pure compound using static or quasistatic methods consists of measuring the temperature and pressure of a sample of the compound when a condensed phase exists in equilibrium with the gas phase. Temperature is measured with a thermometer. Examples of thermometers are mercury-in-glass thermometers, thermocouples, electrical resistance thermometers, thermistors, quartz crystal oscillators, and optical pyrometers [82-guahon]. Pressure usually is measured with a manometer, mercury barometer, Bourdon gage or deadweight gage. The choice of instrument depends upon the accuracy desired and the range of temperatures and pressures, among other considerations. Manometers are used in two general ways. The manometer may be placed in direct contact with the system at equilibrium, usually in contact with the vapor phase. When used this way, the manometer must be kept at a temperature equal to or greater than that of the system. The other technique uses a pressure transducer. A pressure transducer compares the two pressures on either side of the transducer. It responds when the two pressures are equal. One side of the transducer contacts the system and the other side contacts an external fluid (usually a gas) that contacts the manometer. The external pressure is adjusted to equal the system pressure, and then the manometer reads the system pressure. In this technique, the manometer can be maintained at any convenient temperature. A pressure transducer may consist of no more than a simple U-shaped glass tube containing an inert liquid such as mercury. Pressure equality occurs when the liquid is at the same level in both legs of the tube. However, pressure transducers also may be elaborate instruments based upon detecting the movement of some type of diaphragm. Besides the thermometer and pressure gauge, the experimental apparatus requires a means to hold the two phases at equilibrium in close contact long enough for the pressure and temperature to be measured. The thermometer and pressure gauge must respond to the temperature and pressure existing at phase equilibrium. Finally, the measurement requires using a sample of sufficient purity. Errors in measurement arise from calibration and reading of the thermometer and pressure gauge, inappropriate placement of the sensors of these instruments, failure to achieve equilibrium and impurities in the sample. Impurities may be present in the original sample or may arise from decomposition of the sample or other chemical changes that occur during the course of the measurement. Two experimental techniques are used for vapor pressure measurements. In one, the sample is contained in a constant temperature environment (thermostat). When the pressure reaches its equilibrium value, the observed value at the established temperature is the vapor pressure. With the other technique, the sample is maintained at a fixed pressure using a manostat and the system is allowed to reach its equilibrium temperature. The observed temperature at this pressure is the boiling point. Experimental techniques may be somewhat arbitrarily classified as static, quasistatic (also called dynamic), and kinetic [51-par, 93-fre].

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3

1.2.1 Static Techniques 1.2.1.1 Direct Sealed Container Conceptually, this is the simplest type of vapor pressure apparatus. The sample is placed in a closed container and all air and other volatile impurities are removed as completely as possible. The container is placed in a thermostat kept at constant temperature until phase equilibrium occurs. The temperature and pressure are measured. The pressure gauge can be connected to the system directly or through a pressure transducer. The main drawback with this technique is the difficulty associated with removing volatile impurities, which involves a sequence of freeze-thaw cycles of the sample under high vacuum. This procedure becomes more difficult to implement for systems having low vapor pressures because the effects of volatile impurities become greater. The procedure also is sensitive to sample decomposition because decomposition products are usually volatile. The lower limit of usefulness is around 100 Pa. The direct sealed container technique is used more often for mixtures than for pure substances. The possibility of preparing mixtures of accurately known composition compensates for the difficulty in removing volatile impurities. 1.2.1.2 The Isoteniscope Smith and Menzies [10-smimen] first describe the isoteniscope. This instrument operates as a special type of static method using a glass U-tube as a pressure transducer. Generally, the apparatus includes a sample bulb made from glass for visibility. The U-tube may contain mercury but is more likely to contain the liquid phase of the sample being measured. The apparatus usually is placed in a thermostat and the external pressure is adjusted to equal that of the vapor in contact with the sample. The advantage of this technique is that, when the external pressure is lowered, the sample vapor can bubble through the U-tube, which assists in removing volatile impurities. This sample purging is repeated until constant pressure readings are attained. This procedure is also valid for samples that undergo slow decomposition. The accuracy of this method is limited by the sensitivity of the pressure transducer, in normal use about 20 Pa. 1.2.1.3 The Inclined Piston Gage This device employs another variation of the static method. The sample is placed in a cylinder closed at the bottom and fitted with a freely moveable piston at the top. The pressure of the gas sample balances the weight of the piston. The effective weight of the piston can be adjusted by tilting the cylinder from a vertical position. The pressure can be calculated from the tilt angle when the sample pressure balances the piston weight. Although it is difficult to remove volatile impurities, this method provides the most accurate measurements made in the range of 100 to 1500 Pa. It is applicable to solids as well as liquids.

1.2.2 Quasistatic Techniques In quasistatic (or dynamic) techniques, a steady rate of boiling or evaporation is established, and it is assumed that the pressure attained in this steady state is the same as the equilibrium pressure. In careful experiments, pressures are measured at several evaporation rates to verify that they do not depend upon the rate within the experimental conditions. 1.2.2.1 Ebulliometric Techniques Construction details vary considerably for these devices. In all cases, liquid boils when subjected to steady heating. The vapor passes through a reflux condenser and the resulting liquid returns to the boiler, thus

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1 Introduction

[Ref. p. 12

achieving a steady cycle. Generally, a constant pressure is maintained at the top of the condenser and the temperature of the boiling liquid and vapor is measured. This temperature is the boiling point. An advantage of this technique is that volatile impurities, especially air, that do not condense in the condenser are removed at the top of the device. The chief limitations are difficulties in attaining smooth, steady boiling without superheating the liquid and in locating the thermometer such that it records to the equilibrium temperature. Special pumps that spray the thermometer with a mixture of liquid and vapor exist. Difficulties in reaching steady boiling limit this technique to pressures greater than 1000 Pa (greater for some substances). Crude measurements are easy to perform with this technique. With careful attention to details, however it is possible to make the most accurate measurements over the range of 2000 to 200000 Pa using ebulliometers. With high quality samples, boiling point accuracy of 0.01 oC or better is possible. A variation on this technique is twin ebulliometers. In this technique, two matched ebulliometers are connected to the same external pressure at the top of the condenser. A standard substance with accurately known vapor pressure is placed in one ebulliometer and the test sample in the other. When steady boiling is attained in both sides, they are at the same pressure. Pressure is not measured directly; rather the two boiling temperatures are measured. Pressure is established by converting the boiling point of the standard to pressure using a previously determined relationship. For organic liquids, water, benzene, or decane are often used as standards. Diverting some of the liquid from the condenser enables a sample distillation. For a pure sample, the observed boiling point should not change as the distillation proceeds. Any change in boiling temperature is a measure of sample purity. This method also produces vapor-liquid equilibrium data for mixtures. It is restricted to liquid samples, however. 1.2.2.2 Transpiration Technique In this method, a steady stream of inert gas passes over or through the sample held at a constant temperature. The concentration of the sample in the emerging stream is measured. This concentration is then converted to partial pressure, usually by assuming an ideal gas mixture. This partial pressure is the vapor pressure. The method is applicable for solid or liquid samples. The accuracy of this technique is limited by the difficulty in maintaining steady gas flow, in achieving a sample concentration corresponding to equilibrium without entrainment of liquid drops or solid dust particles, and in analyzing the gas stream. Analysis sometimes employs condensing the sample in a cold trap, and sometimes using some type of chemical analysis. Occasionally, data of high accuracy results from this method, but usually they range from 0.5 to 5%. This method is most useful over the range 100 to 5000 Pa. Its sensitivity to impurities depends upon the method of analysis.

1.2.3 Kinetic Methods In kinetic methods, a steady rate of evaporation, not necessarily close to equilibrium, is established and measured. Temperature is constant but pressure is not measured directly. Rather, pressure is calculated from the evaporation rate using kinetic theories. Accuracies are low using such methods. The techniques are used exclusively for pressures below about 100 Pa where other methods are not applicable. Even when kinetic methods do not yield meaningful absolute pressures, they may produce a temperature derivative of pressure that can provide the enthalpy of vaporization using Eq. (1.1). 1.2.3.1 Knudsen Effusion Method In this method, the sample is placed in a small heated chamber with a small hole in either a side or the top. The chamber is placed in a continuously pumped, high vacuum environment. As the sample evaporates gas effuses through the hole into the external vacuum. The flow rate of gas though the hole is a function of

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Ref. p. 12]

1 Introduction

5

internal pressure, temperature, and the diameter and length of the hole. Under ideal conditions, kinetic theory provides this flow rate (see [93-fre] for this derivation). Measurement of the sample weight loss during evaporation at constant temperature provides the rate of evaporation. Using a continuous weighing technique that does not require removal of the sample chamber greatly increases the speed of making measurements. One method consists of suspending the sample chamber from a quartz spiral spring and measuring its change in length as the sample evaporates. However, temperature measurement is difficult using this technique. 1.2.3.2 Langmuir Method In this method, the rate of evaporation from an open surface directly into a vacuum is measured. This rate bears some relation to vapor pressure, but it also depends in complicated way upon many other variables. Among these variables are the effective surface area and the coefficient of vaporization. A discussion appears in [93-fre]. This method is confined almost exclusively to solids, and the magnitude of the pressure is subject to large errors.

1.2.4 Measurement of Critical Constants Special techniques have been developed to measure critical temperature, pressure and density. The most common manner to observe the critical temperature is to heat a sample in a closed tube and measure the temperature at which the boundary (meniscus) between liquid and vapor disappears. This method produces an accuracy of about 0.5 degree in most cases. More sophisticated methods for detecting the merging of the two phases are available, but achieving a reproducibility of better that 0.1 degree is difficult. Some properties of a substance change rapidly in the vicinity of the critical point and many organic compounds decompose at or below the critical temperature. Rapid methods of observation have been developed for these compounds. The force of gravity influences the measurement of critical temperature. Some have suggested that accurate measurements of the critical temperature must be made in the absence of gravity, such as in an orbiting satellite. This experiment has not yet been performed. Given the critical temperature of a substance, the critical pressure can be obtained by measuring the pressure at that temperature. It is more common to measure the vapor pressure over a range near the critical temperature, and then to extrapolate to the critical temperature.

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[Ref. p. 12

1.3 Mathematical Representation of Vapor Pressure 1.3.1 Thermodynamic Relationships A consequence of the second law of thermodynamics is that the chemical potential of any component in equilibrium phases at a particular temperature or pressure is the same in all phases. For a pure compound the chemical potential is the Gibbs energy per mole of the substance. The following equation results for a condensed phase in equilibrium with the gas phase. dP/dT = (∆vH )(∆vV) –1 T –1

(1.1)

In this equation ∆vH is the molar change in enthalpy for the conversion of substance from the equilibrium liquid to the equilibrium vapor phase. ∆vV is the molar change in volume when the substance changes from the liquid to the gas. This equation allows calculation of the enthalpy of vaporization from vapor pressure, and it is the second law method. Measurement of enthalpy of vaporization with a calorimeter is the first law method. The quantities ∆vH and ∆vV are functions of temperature along the phase boundary. Equation (1.1) can also be written as, d(ln P)/dT = (∆vH)(∆vZ–1) R –1 T –2

(1.2)

where Z is the compression factor (Z = PV/RT). At temperatures well below the critical temperature, the liquid volume is negligible compared to the gas volume. If, furthermore, the gas is ideal, then ∆vZ is 1.0 and Eq. (1.2) becomes, d(ln P)/dT = (∆vH)R–1T –2

(1.3)

known as the Clausius-Clapyron equation. The total derivative of ∆vH along the boundary is a function of heat capacities and volumes, d(∆vH)/dT = ∆vCp + ∆vV – T(∂∆vV/∂T)p

(1.4)

If the functional forms of the heat capacities and volumes of the phases are known, they can be substituted into Eqs. (1.2) and (1.4) and upon integration provide an accurate, functional representation of the vapor pressure: T0

[

ln P = ln P0 + ∫ (∆ V H )(∆ V Z ) R T

−1

−1

] dT

−1

(1.5)

Here, P0 is the pressure at some reference temperature, T0. However, it is rare that the functions are known sufficiently well to derive an accurate vapor pressure equation in this way (see [82-mos/van, 96-ruzmaj] for a more complete thermodynamic analysis of vapor pressure). More approximate vapor pressure equations result from making various assumptions and simplifications. For example, the terms ∆vV – T(∂∆vV/∂T) nearly cancel at temperatures well below the critical temperature. At these temperatures the liquid volume is much smaller than the gas volume and can be neglected. Neglecting these terms, assuming the gas phase is ideal, and assuming ∆vCp is constant, Eq. (1.5) becomes ln P = ln P0 – [∆vCp(1 + ln T0) + ((∆vH0)T0-1 – (∆vH0) + T0)(∆vCp)(T)–1) + (∆vCp) ln T]R –1

(1.6)

If ∆vCp is zero, Eq. (1.6) becomes, ln P = a + bT –1

(1.7)

where a and b are constants. Equation (1.7) is used often to represent approximate vapor pressure data, especially for low pressures where experimental data are seldom accurate.

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1 Introduction

7

1.3.2 Empirical Vapor Pressure Equations During the past century many empirical mathematical functions have been used to relate vapor pressure to temperature; most are modifications of Eq. (1.7). These functions have several parameters that are characteristic of the compound. Curve fits off experimental data, usually by minimizing the sum of the squares of the deviations between the calculated and observed pressures or temperatures (least squares criterion), provide these parameters. The first and most widely used of these equations is the Antoine equation [1888-ant, 46-tho]. The original form is, log P = A – B (C + T)–1

(1.8)

Sometimes the natural logarithm is used instead of the base-10 logarithm or Celsius temperature is used instead of Kelvin. When C = 0 (for T in kelvins) Eq. (1.8) is identical to Eq. (1.7). The Thermodynamics Research Center Thermodynamic Tables - Hydrocarbons [xx-trchc] and Nonhydrocarbons [xx-trcnh] use an extended version of the Antoine equation: log P = A – B (C + T) -1 + 0.43429χn + Eχ8 + Fχ12

(1.9)

where n, E, and F are additional adjustable parameters. Tc is the critical temperature, T0 the lower boundary temperature and χ = (T – T0)/Tc. Examples of functions obtained by adding terms to Eq. (1.7) are the polynomial in temperature used in the International Critical Tables [26-ano], ln P = A + BT-1 + CT + DT 2,

(1.10)

the Chebyshev polynomial [70-ambcou] i

T lnP = a0 / 2 + ∑ a s E s (χ)

(1.11)

χ = [2T – (Tmax – Tmin)] / (Tmax – Tmin)

(1.12)

s =1

in which Es (χ) is a Chebyshev polynomial in χ of degree s (the advantage of this is that the Es functions are orthogonal), the Kirchoff-Rankine equation [48-tho], ln P = A + BT -1 + C ln T,

(1.13)

(same form as Eq. (1.6)); the Planck-Riedel equation [48-plarie] ln P = A + BT -1 + C ln T + DP6 ,

(1.14)

and the Frost-Kalkwarf equation [53-frokal] ln P = A + BT –1 + C ln T + DPT –2

(1.15)

Another popular type of function is the Cox equation [36-cox]: ln (PP0–1) = A (1 – TbT)

(1.16)

where A is a function of temperature often taken to be ln A = a + bT + cT2

(1.17)

Wagner and others [73-wag, 73-wag-1, 77-wag, and 86-amb-1] have proposed a series of related equations. The simplest is ln (PPc–1) = (Aτ + Bτ 1.5 + Cτ 3 + Dτ 6 ) / Tr

(1.18)

where τ = 1 – T/Tc, Pc is the critical pressure and Tc is the critical temperature. One of the variations [76-wagewe] is: ln (PPc–1) = (Aτ + Bτ 1.5 + Cτ 3 + Dτ 6 + Eτ 9) / Tr

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(1.19)

8

1 Introduction

[Ref. p. 12

Iglesias-Silva et al. [87-iglhol] have proposed an accurate, three parameter equation that can fit data from the triple point to the critical point: (1.20)

[

]

 a + a ( a t + 1) b0 / R exp((− a + b / R ) /( a t + 1)) N 0 1 3 2 0 3 p= 2− Θ 3 4 + 2 − a 4 (1 − t ) + a 5 (1 − t ) + a 6 (1 − t ) + a 7 (1 − t )

[

1/ N

 N 

]

in which p = 1 + (P – Pt)/ (Pc – Pt) t = (T – Tt)/ (Tc – Tt) a0 = 1 – Pt/ (Pc – Pt) a1 = – (a0 – 1) exp(a2 – b0/R) a2 = b1/RTt a3 = (Tc – Tt)/ Tt

θ = 0.2 Ν = 87Tt / Tc a5, a6, and a7 are polynomial functions of a4 An important characteristic of a function is its number of adjustable parameters. When fitting a function to a set of observed data, the number of data values minus the number of fitting parameters is the degrees of freedom (f). One measure of how well a function fits data is the standard deviation, S = (Σ (Pobs - Pcalc)2) 0.5f –1

(1.21)

Functions with more parameters are more flexible than those with fewer and can fit experimental data better over a wider temperature range. If the degree of freedom is zero, any function can fit the data exactly, however, this is undesirable. Experimentally based data contain experimental errors. A major objective in fitting data to a function is to obtain a smooth representation of the data that reduces the effect of random errors and provides a means to interpolate and extrapolate the function. Parameters calculated with too few degrees of freedom not only fail to reduce random errors, but they may give unreliable interpolations. It is not wise to make calculations for which the degrees of freedom are less than half the number of data. For vapor pressure, more degrees of freedom are better. Even when the degrees of freedom are acceptable, fitting functions with a large number of parameters to data with large errors may give less reliable results than using a function with fewer parameters. Vapor pressure equations have been tested and compared [64-mil, 78-amb, 79-scoosb, 80-ambdav, 83-mcg, 85-amb, 90-yalmis, 96-ruzmaj]. Comparing functions with the same number of adjustable parameters does not always give a clear indication of which is best. Some functions work better for certain ranges of temperature or pressure, or for certain compounds or classes of compounds. None of the equations listed above is clearly preferable in all situations. Variations of the Wagner equation are effective near the critical temperature, but they have no advantage at lower temperatures. All of the above equations relate the logarithm of pressure to a function of temperature. Thus, the adjustable parameters are non-linear functions of pressure. Using the least squares criterion with pressure as a direct function of temperature requires a non-linear fit. It is more common, however, to take ln(P) as a function of temperature and to select a form from among the Eqs. (1.7, 1.9, 1.10, 1.11, 1.12, 1.17, 1.18).

Landolt -Börnst ein New Series IV/20C

Ref. p. 12]

1 Introduction

9

Non-linear least squares calculations are more complex than linear calculations. They start with an initial estimate and find the minimum variance by using a sequence of iterations. It is possible, and common, to converge upon local minima rather than the global minimum. Numerical least squares techniques are described in [88-prefla]. The Antoine Eq. (1.8) may be rearranged as: T log P = AC – B + AT – C log P

(1.22)

Thus, if T log(P) is a function of log(P) and T, it is linear in the parameters (AC–B), A, and –C and easily yield A, B and C. This is the usual procedure for calculating Antoine parameters. If the truncated virial equation of state (V = RT/P + B’) provides the gas volume, the enthalpy of vaporization can be calculated from the B and C parameters of Eq. (1.8): ∆vH = 2.30258 R(T(T + C) –1) 2 (1 + B’P T–1)

Lando lt -Bö rnst ein New Series IV/20C

(1.23)

10

1 Introduction

[Ref. p. 12

1.4 Description of the Tables The Antoine Eq. (1.8) has been used to represent vapor pressures of pure compounds more than any of the others because it has several important advantages: • •

It is a simple equation, with 3 adjustable parameters that easily can calculate vapor pressure It can be solved for temperature, as well as pressure, in closed form T = B(A – log P) –1 – C

(1.24)

• Linear least squares may be used to obtain the parameters using Eq. (1.20) • It fits most experimental vapor pressures in the range of 1.5 to 150 kPa • Useful correlations exist among the Antoine parameters (or at least relationships among them) and molecular structure. Data of sufficient accuracy to show significant deviation from the Antoine equation in the 1.5 - 150 kPa exist for only a few compounds. To fit accurate data over a wider range requires a more complex equation. However, as indicated above using an equation with too many parameters may give undesirable results. The Antoine equation, using parameters fit to reliable data in the range 1.5 - 150 kPa, under predicts higher vapor. This difference increases regularly and smoothly up to the critical temperature. To represent pressures in this range, the Thermodynamics Research Center at Texas A&M University (TRC) uses the extended Antoine Eq. (1.9). The additional term 0.43429χn, where n is a fit parameter, approximate real data very closely. Because χ < 1, and E and F have opposite signs the pair of terms Eχ8 + Fχ12 contribute appreciably only near the critical temperature. Unless accurate vapor pressures are available in this region, E and F can be set to zero. Generally the A, B, and C constants are the same in Equs. (1.8) and (1.9) for the same compound. The major exceptions are the alcohols with low carbon numbers. Because the exponent n is greater than or equal to 2.0, Eqs. (1.8) and (1.9) give equal P and dP/dT at the boundary temperature, T0, thus, effecting a smooth transition. The usual procedure is to fit the simple Antoine equation to data in the 1.5 - 150 kPa region, which contains most of the accurate data. Then, while keeping the same A, B, and C, the parameters n, E, and F are fit to the data for temperatures above T0. Good results are obtained for T0 corresponding to vapor pressures in the range of 120 to 150 kPa. To retain the Antoine equation for data below 1.5 kPa, a separate set of constants can be fit to the low range. The TRC Thermodynamic Tables [xx-trchc, xx-trcnh] use a least squares procedure that forces continuity in P and dP/dT for the same phase at the boundary. The vapor pressure of the two condensed phases existing at a triple point is the same. However, the slopes of the vapor pressure curves below and above this temperature are different. Calculation of the parameters A, B, and C that characterize a particular compound requires accurate vapor pressure data over a sufficient range of temperature (about 20 deg or more). The constant C is especially sensitive to errors in the data. When suitable data are used, C is always negative. Within a group of related compounds C, decreases in a smooth manner as the normal boiling point increases. Examples of groups are isomers or members of a homologous series. By plotting C vs. Tb for members of a group that have reliable data, it is possible to estimate a C value for members that do not have reliable data. A positive C obtained from a least squares fit is an indication that the data contain large errors or cover a narrow temperature range or both. The corresponding Antoine equation may give a rough reflection of the data, but it should not be used for extrapolation. Parameters of the Antoine Eq. (1.8) and the extended Antoine Eq. (1.9) based upon experimental data appear as tables in sections 2 to 4 of this volume.

Landolt -Börnst ein New Series IV/20C

Ref. p. 12]

1 Introduction

11

In the Tables the following information is given: One line presents the substance identification (bold faced): • 1. An identification number for the compound. • 2. The empirical (Hill system) gross formula of the compound (the compounds are listed in formula order sorted by the number of carbon atoms (C), hydrogen atoms (H), and other elements in alphabetical order). • 3. The compound name and zero or more synonyms. • 4. The Registry Number assigned by Chemical Abstracts Services, when available. When a CASRN is not available, numbers starting at 50000-00-0 identify compounds in the SOURCE Database maintained by the Thermodynamics Research Center. The lines following the substance identification provide the data • 1. Column: Identification of the phase transition (cr - crystal, l - liquid, g - gas). • 2. Column: A, (n) - The value of A parameter in Eq. (1.8) with P expressed in units of kPa. The value in parentheses, if present, is the value of n in Eq. (1.9). • 3. Column: B/K (E) - The value of B in Eq. (1.8). The value in parentheses, if present, contains the value of E in Eq. (1.9). • 4. Column: C/K (F) - The value of C in Eq. (1.8) with T in kelvins. The value in parentheses, if present, contains the value of F in Eq. (1.9). • 5. Column: T-range [K] - The approximate minimum and maximum temperatures covered by the data. • 6. Column: Range [K], Rating - The range of temperatures recommended for reliable use of the equation. If this line contains constants for the extended Antoine Eq. (1.9), the lower limit of the range is T0 and the upper limit is Tc. The lower limit for a liquid phase is never less than the triple point. The upper limit for crystal phases is never greater than the triple point. The "rating" consists of letters A through D. The ratings indicate a rough order of reliability for the data used to develop the parameters: A - 0.1%; B 1%; C - 5%; D - 10%. • 7. Column: Tb [K]/Pb [kPa] - The boiling point at the indicated pressure as calculated from the Antoine equation with the listed parameters. • 8. Column: Ref. - An identification of the source of the Antoine constants listed for the designated compound and phases. Complete references appear in the section ‘References’. • 8. Column: Note - The numbers refer to the text included in the section ‘Notes’. The data represented in the Tables has been obtained from several sources: • TRC Thermodynamic Tables - Hydrocarbons. Identified by [xx-trchc] in the Ref. column. ‘xx’ is the last two years of the date of issue of the data sheet. • TRC Thermodynamic Tables - Nonhydrocarbons. Identified by [xx-trcnh] in the Ref. column. ‘xx’ is the last two years of the date of issue of the data sheet. The original sources of data used for these Tables appear in the Specific Reference sheets of the TRC Thermodynamic Tables. • Compilations prepared by the Slovakian Academy of Sciences [79-dykrep, 84-dykrep]. • Other sources - References to original sources of data are given. These refer to sources not used in the [xx-trchc, xx-recnh, 79-dykrep, 84-dykrep]. The number of significant digits given for the parameters values is also a rough indication of the data quality for values from [xx-trchc, xx-trcnh] but not for data from other sources.

Lando lt -Bö rnst ein New Series IV/20C

12

1 Introduction

1.5 References for 1 xx-trchc

1888-ant

TRC Thermodynamic Tables - Hydrocarbons, Thermodynamics Research Center, Texas A&M University System, College Station, TX, (19xx). TRC Thermodynamic Tables - Non-Hydrocarbons, Thermodynamics Research Center, Texas A&M University System, College Station, TX, (19xx) Antoine, C.: C. R. Acad Sci. (Paris) 107 (1888) 681.

10-smimez 10-smimez 10-smimez

Smith, A., Menzies, A.W.C.: Ann. Phys. 33 (1910) 971. Smith, A., Menzies, A.W.C.: J. Am. Chem. Soc. 32 (1910) 1412. Smith, A., Menzies, A.W.C.: J. Am. Chem. Soc. 32 (1910) 1448.

26-ano

International Critical Tables of Numerical Data: Physics. Chemistry. Technology. Vol. 1 (and following volumes). Washburn, E.W.(ed.), New York: McGraw-Hill, 1926.

46-tho

Thompson, G.W.: Chem. Rev. 38 (1946) 1.

48-plarie

Plank, R., Riedel, L.: Ing. Arch. 16 (1948) 255.

51-par

Partington, J.R.: An Advanced Treatise on Physical Chemistry, Vol. 2, Properties of Liquids, London: Longmans, Gree and Co., 1951.

53-fro/kal

Frost, A.A., Kalkwarf, D.R.: J. Chem. Phys. 21 (1953) 264.

64-mil

Miller, D.G.: Ind. Eng. Chem. 56 (1964) 46.

70-amb/cou

Ambrose, D., Counsel, J.F., Davenport, A.J.: J. Chem. Thermodyn. 2 (1970) 283.

73 wag 73-wag-1

Wagner, W.: Cryogenics 13 (1973) 470. Wagner, W.: Bull. Inst. Int. Froid Annexe. 4 (1973) 65.

76-wagewe

Wagner, W., Ewers, J., Pentermann, W.: J. Chem. Thermodyn. 8 (1976) 1049.

77-wag

Wagner, W.: A New Correlation Method for Thermodynamic Data Applied to the Vapor Pressure Curve of Argon, Nitrogen, and Water, IUPAC Thermodynamic Tables Project Centre, London: Imperial College, 1977.

78-amb

Ambrose, D.: J. Chem. Thermodyn. 10 (1978) 765.

79-dykrep 79-scoosb

Dykyi, J., Repas, M.: Saturated Vapor Pressure of Organic Compounds, Bratislava, Czech.: Slovakian Academy of Science, 1979. Scott, D.W., Osborn, A.G.: J. Phys. Chem. 83 (1979) 2714.

80-ambdav

Ambrose, D., Davies, R.H.: J. Chem. Thermodyn. 12 (1980) 871.

82-guahon 82-mosvan

Guang, L., Hongtu, T.: Temperature. Its Measurement and Control in Science and Industry, Vol. 5, 1982 (see also earlier volumes). Mosselman, C., van Vugt, W.H., Vos, H.: J. Chem. Eng. Data 27 (1982) 248.

83-mcg

McGary, J.: Ind. Eng. Chem. Process Des. Dev. 22 (1983) 313.

xx-trcnh

Landolt -Börnst ein New Series IV/20C

1 Introduction 84-dykrep

Dykyi, J., Repas, M., Svoboda, J.: Saturated Vapor Pressure of Organic Compounds, Bratislava, Czech.: Slovakian Academy of Science, 1984.

86-amb

Ambrose, D.: The Evaluation of Vapour-Pressure Data, London: Dept. of Chemistry, University College, 1986. Ambrose, D.: J. Chem. Thermodyn. 18 (1986) 45.

86-amb-1

13

88-prefla

Press, W.H., Flannery, B.P., Teukolsky, S.A., Vetterling, W.T.: Numerical Recipes in C, Cambridge, UK: Cambridge University Press, 1988.

90-its 90-yalmis

International Temperature Scale: Metrologia 27 (1990) 3; 107. Yalkowsky, S.H., Mishra, D.S., Morris, K.H.: Chemosphere 21 (1990) 107.

93-fre

Frenkel, M.(ed.): Thermochemistry and Equilibria of Organic Compounds, New York: VCH Publishers, 1993.

95-ambtso 95-ambyou 95-gudtej 95-tsoamb

Ambrose, D., Tsonopoulos, C.: J. Chem. Eng. Data 40 (1995) 531. Ambrose, D., Young, C.: J. Chem. Eng. Data 40 (1995) 345. Gude, M., Teja, A.S.: J. Chem. Eng. Data 40 (1995) 1025. Tsonopoulous, C., Ambrose, D.: J. Chem. Eng. Data 40 (1995) 547.

96-dau 96-ruzmaj

Daubert, T.E.: J. Chem. Eng. Data 41 (1996) 365. Ruzicka, K., Majer, V.: AIChE J. 42 (1996) 1723.

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14

Organic Compounds C0 to C84

[Ref. p. 125

2 Tabulated Data on Vapor Pressure of Nitrogen Containing Organic Compounds (Including Some Inorganic Compounds)

Organic Compounds C0 to C84 Phase Antoine constants A, (n) B [K], (E) C [K], (F)

T-Range [K]

Range [K] Rating

Tb [K]/Pb [kPa]

Ref. Note

1 cr-g

BrH4N 8.3449

3947.

Ammonium bromide -46.15 537/699

530/706 C

668.75/101.325

12124-97-9 90-trcnh

2 cr-g

ClH4N 8.4806

3703.7

Ammonium chloride -41.15 494/640

486/648 C

613.15/101.325

12125-02-9 90-trcnh

3 cr-g

CIN 9.64177

3205.218

Cyanogen iodide 6.306 294/413

292/415 C

413.44/101.325

506-78-5 33-yossto, 35-kel

4 cr-g l-g

ClNO 7.6657 6.48644

1397.3 1094.73

Nitrosyl chloride -12.15 202/215 -23.45 215/285

192/213.6 213.6/293 C

267.77/101.325

2696-92-6 59-trcnh 59-trcnh

5 l-g

ClNO2 4.4972

395.4

Nitryl chloride -99.15 193/244

186/252 C

257.85/101.325

13444-90-1 59-trcnh

6 l-g

Cl3N 6.081

1190.

Nitrogen trichloride -52.15 258/367

252/375 C

344.15/101.325

10025-85-1 59-trcnh

7 l-g

FNO 5.5684

556.13

Nitrosyl fluoride -57.15 163/227

153/237 B

213.25/101.325

7789-25-5 59-trcnh

8 l-g

FNO2 5.9583

654.55

Nitryl fluoride -35.15 151/214

141/224 B

200.75/101.325

10022-50-1 59-trcnh

9 l-g

FNO3 5.79076

769.5

Nitrogen trioxide fluoride -25.15 165/246

160/252 C

229.15/101.325

7789-26-6 59-trcnh

10 l-g

FNS 5.6067

877.1

Thiazyl fluoride -34.15 270/299

265.3/303 C

277.75/101.325

18820-63-8 59-trcnh

11 l-g

F2N2S 5.9077

901.

Dinitrogen sulfur difluoride -31.15 192/281 190/282 D

262.05/101.325

500010-01-5 59-trcnh

12 l-g

F 3N 5.90456

501.913

Nitrogen trifluoride -15.36 105/154

144.09/101.325

7783-54-2 59-trcnh

95/164 B

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Ref. p. 125]

Organic Compounds C0 to C84

Phase Antoine constants A, (n) B [K], (E) C [K], (F)

T-Range [K]

15

Range [K] Rating

Tb [K]/Pb [kPa]

Ref. Note

13 l-g

F3NS 6.01

888.5

Nitrogen fluoride sulfide -28.15 184/268

179/275 C

250.05/101.325

15930-75-3 59-trcnh

14 l-g

HN3 5.982

1066.

Hydrogen azide -41.15 229/331

228/332 D

309.15/101.325

7782-79-8 60-trcnh

15 l-g

HNO3 6.6368

1406.

Nitric acid -52.15

274/376

266/386 C

356.15/101.325

7697-37-2 60-trcnh

16 l-g

H2N2 6.93782

1684.04

Hydrazine -45.145

288/343

278/353 A

386.65/101.325

302-01-2 73-boufri

17 cr-g

H4IN 8.2719

3959.

Ammonium iodide -47.15 544/710

544/710 D

678.95/101.325

12027-06-4 90-trcnh

18 cr-g

H4N4 9.5473

2821.

Ammonium azide -33.15 338/422

338/422 D

406.65/101.325

12164-94-2 60-trcnh

19 cr-g l-g

ND3 8.88638 6.61234

1532.2 966.226

Ammonia-d3 -9.15 188/201 -32.35 196/256

180/198.8 C 198.8/266 B

242.1/101.325

13550-49-7 60-trcnh 60-trcnh

20 cr-g l-g

NH3 9.1076 6.48729

1617.4 926.834

[N]-Ammonia -1.15 185/195 -32.95 193/254

180/195.5 C 195.5/264 B

239.76/101.325

13767-16-3 60-trcnh 60-trcnh

21 cr-g l-g

NH3 9.08872 6.4854

1617.91 926.132

Ammonia -0.6 -32.98

175/195.4 B 195.4/264 B

239.72/101.325 239.72/101.325

22 cr-g l-g

NO 8.75316 7.8679

758.736 682.938

Nitrogen oxide (Nitric oxide) -7.15 97/108 87/109.5 B -4.88 107/127 109.5/137

121.38/101.325

10102-43-9 60-trcnh 60-trcnh

23 cr-g l-g

NO 8.67426 7.7876

740.46 665.363

[N]-Nitrogen oxide -8.75 97/109 -6.53 107/128

90/109.6 C 109.6/138 B

121.61/101.325

15917-77-8 60-trcnh 60-trcnh

24 cr-g l-g

NO 8.76284 7.85303

757.43 679.529

[O]-Nitrogen oxide -7.75 97/109 -5.45 107/128

90/109.7 C 109.7/138 B

121.69/101.325

15917-78-9 60-trcnh 60-trcnh

25 cr-g l-g l-g

N2 6.47032 5.69633 5.69633 (0.434294)

322.222 265.684 265.684 (15.32)

Nitrogen -3.17 -5.366 -5.366 (-15.5)

50/63.15 B 63.15/80 80/126.2

77.35/101.325 77.35/101.325 77.35/101.325

7727-37-9 60-trcsp 87-trcsp 87-trcsp

26 cr-g l-g

N2 6.48886 5.61904

323.17 255.535

[N]-Nitrogen -3.27 55/64 -6.69901 61/84

50/63.2 C 63.2/93 B

77.42/101.325 77.42/101.325

29817-79-6 60-trcnh 60-trcnh

27 l-g l-g

N2 6.4816 5.62107

322.98 255.848

[NN]-Nitrogen -3.19 55/64 -6.619 61/84

47/63.2 B 63.2/94 B

77.39/101.325 77.39/101.325

17787-11-0 60-trcnh 60-trcnh

Lando lt -Bö rnst ein New-Series IV/20C

185/195 196/254

55/64 63.5/78 80/126.2

7664-41-7 60-trcnh 60-trcnh

16

Organic Compounds C0 to C84

Phase Antoine constants A, (n) B [K], (E) C [K], (F)

T-Range [K]

Range [K] Rating

[Ref. p. 125

Tb [K]/Pb [kPa]

Ref. Note

28 cr-g l-g

N2O 8.5619 6.12884

1174.02 654.26

Dinitrogen oxide (Nitrous oxide) -4.93 147/182 137/182.3 C -25.99 185/197 182.3/207 B

184.67/101.325 184.67/101.325

10024-97-2 60-trcnh 60-trcnh

29 cr-g l-g

N2O4 9.97221 6.50989

2194.17 1185.72

Dinitrogen tetroxide -12.03 239/262 -38.97 264/320

294.3/101.325 294.3/101.325

10544-72-6 60-trcnh 60-trcnh

30 cr-g l-g

N2O4 9.86121 8.04202

2075.53 1798.54

Dinitrogen tetroxide, equilibrium mixt., NO2, N2O4 -20.35 237/263 228/263 B 3.65 252/309 263/319 B

800001-10-9 60-trcnh 60-trcnh

31 cr-g

N2O5 10.7694

2510

Dinitrogen pentoxide -20.15 260/314

255/314.0 C

305.5/101.325

10102-03-1 60-trcnh

32 cr-g

CBrN 9.09303

2321.890

Cyanogen bromide -3.993 255/313

255/315 C

290.89/10

506-68-3 20-baxbez, 54-lorwoo

33 l-g

CBrN3O 7.82550

2519.030

Bromotrinitro-methane 1.465 318/335

318/335 C

320.44/1

560-95-2 70-carzim Note 9

34 l-g

CClF2NO 6.95775 1311.748

Difluorobarbamyl chloride -3.090 189/268

185/270 B

267.98/101.325

16847-30-6 67-frashr

35 l-g

CClF4N 6.75427

Difluoro(difluoro-chloromethyl)amine -4.816 209/277 207/280 C

237.91/10

13880-71-2 70-zabshr

36 l-g

CClF4NO2S 6.435 1503

Chloro(trifluoro-methyl) sulfanoyl fluoride 0.000 253/288 253/290 C

276.54/10

37

CClF4NO12S4

53684-03-0

l-g

7.955

2520

Fluorosulfuric acid bis[(fluorosulfonyl)oxy]amino chloromethylene ester 0.000 L 373 >373 D

345.42/10

30957-48-3 71-saushr Note 1

75 l-g

CH2F3NS 7.585 1783

1,1,1-Trifluoro-methane sulfenamide 0.000 218/291 217/320 C

319.58/101.325

1512-33-0 60-emenab Note 2

76 cr-g l-g

CH2N2 10.14855 8.915

Cyanamide -1.212 273/298 0.000 L

298.24/0.001 327.99/0.01

420-04-2 99-svo 60-ano-2 Note 1

740.834

1476.780

3905.528 3580

300/317

276/300 C L>318 D

25523-80-2 69-glemew Note 2

74-90-8 99-svo Note 9 99-svo Note 10 420-05-3 38-lin-1 38-lin-1 Note 16 463-56-9 79-dykrep 79-dykrep 517-25-9 67-mirleb Note 2 67-mirleb Note 2

Landolt -Börnst ein New Series IV/20C

Ref. p. 125]

Organic Compounds C0 to C84

Phase Antoine constants A, (n) B [K], (E) C [K], (F)

19

T-Range [K]

Range [K] Rating

Tb [K]/Pb [kPa]

Ref. Note

77 cr-g

CH2N4 10.55124

4592.475

1H-Tetrazole -0.218 333/404

330/405 C

397.79/0.1

288-94-8 99-svo Note 10

78 l-g

CH3F2N 5.98209

872.954

N,N-Difluoro methylamine -37.661 204/256

202/260 C

257.20/101.325

753-58-2 60-fra-1 Note 10

79 l-g

CH3F2NS 7.18890 1502.744

S,S-Difluoro-N-sulfimine 0.228 194/258

192/262 C

242.58/10

83 l-g

CH3NO2 6.77472

1666.225

Nitromethane -24.542 283/343

288/343 A

313.08/10

l-g

6.43229

1463.344

-43.729

343/462

343/410 B

374.31/101.325

84 l-g

CH3NO2 6.32771

1080.233

Methyl nitrite -5.697 218/273

217/275 C

255.64/101.325

85 l-g

CH3NO3 6.93907

1586.806

Methyl nitrate -15.925 263/333

262/333 C

337.57/101.325

86 cr-g

CH3NSi 10.0759

2550

Isocyanosilane 0 253/304

253/304 D

87 cr-g

CH3N5 11.30085

5879.845

5-Aminotetrazole 0.000 383/443

382/445 C

88 l-g

CH4F2NPS 9.46303 3721.23

N-Methylphosphor-amidothionic acid 100.46 273/325 273/325 C

89 l-g

CH4N2 4.57265

507.649

Methyl diazene-d -88.267 195/236

193/240 D

90 l-g

CH4N2 7.23568

1436.89

Methyl diazene 0 195/236

195/236 D

91 cr-g

CH4N2O 10.40186

4634.013

Urea -15.625

337/400

336/405 C

389.28/0.01

57-13-6 99-svo

92 cr-g

CH4N2S 11.21344

5645.172

Thiourea 2.629

368/395

365/398 C

394.54/0.001

62-56-6 99-svo

93 cr-g

CH4N4O2 8.10 7452

Nitroguanidine 0.000 402/473

402/475 C

462.86/ 0.00000001

556-88-7 78-cunpal Note 2

94 l-g l-g

CH5N 6.5442 6.213

Methanamine -35.32 203/288 -53.15 288/433

190/288 A 288/443 B

266.82/101.325

Lando lt -Bö rnst ein New-Series IV/20C

1050.66 899.03

758-20-3 66-cohmac 75-52-5 54-mccsco, 49-holdor 54-mccsco, 67-berwes 624-91-9 36-thopur, 61-geithi 598-58-3 55-vanlau, 57-grapra, 52-mckmoe 18081-38-4 79-dykrep

442.07/0.01

4418-61-5 99-svo 31411-30-0 84-dykrep

230.36/10

34994-49-5 72-ackhal 26981-93-1 84-dykrep

74-89-5 86-trcnh 86-trcnh

20

Organic Compounds C0 to C84

Phase Antoine constants A, (n) B [K], (E) C [K], (F)

T-Range [K]

[Ref. p. 125

Range [K] Rating

Tb [K]/Pb [kPa]

Ref. Note

95 cr-g l-g

CH5NO 4.13665 8.37304

667.358 2404.876

N-Methylhydroxyl-amine -140.995 273/313 -11.357 293/338

272/315 D 293/342 C

302.32/1 337.53/10

96 l-g

CH5NO 6.53089

1245.043

O-Methylhydroxyl-amine -46.078 209/321

209/325 D

321.21/101.325

97 cr-g

CH5N3O 12.2556

5434.01

Semicarbazide -10.15 337/364

336/365 C

98 l-g l-g

CH6ClN 12.41829 6.37714

6487.877 1226.07

Methylamine hydrochloride 29.091 518/573 518/523 D -26.7 197/307 187/317 C

103 cr-g

CN4O8 9.33402

2938.634

Tetranitromethane 24.314 256/287

255/288 C

280.68/0.5

l-g

6.25426

1428.169

-62.651

280/402 B

398.81/101.325

104 l-g

C2ClFN2 7.09238

1615.135

cis-Chloro(fluoro-imino) acetonitrile -1.350 254/319 252/322 C

318.87/101.325

30915-40-3 71-zabshr

105 l-g

C2ClFN2 6.78994

1409.971

trans-Chloro-(fluoroimino) acetonitrile -23.782 258/320 256/322 C

318.49/101.325

30915-39-0 76-zelsha

106 l-g

C2ClF2NO2 7.095 1913

Carbamic fluoride, chloro(fluoro-carbonyl) 0.000 L C

375.89/101.325

42016-33-1 73-sprwri Note 1

107 l-g

C2ClF4NO 6.967 1540

Carbamic fluoride, chloro(trifluoro-methyl) 0.000 L C

310.40/101.325

42016-31-9 73-sprwri Note 1

108

C2ClF4NO4S

42016-34-2

l-g

5.775

1500

Carbamic acid, chloro(trifluoro-methyl)anhydride with fluorosulfuric acid 0.000 L C 397.95/101.325

109 l-g

C2ClF6NOS 7.5349 1815

Imidosulfuryl fluoride, (2-chloro-1,1,2,2-tetra-fluoroethyl) 0.000 L C 328.26/101.325

34495-79-9 71-mewgle Note 1

110 l-g

C2ClF6NS 6.555 1458

Bistrifluoromethyl-amino sulfenyl chloride 0.000 245/318 245/321 C

1768-32-7 63-eme Note 2

111

C2ClF10NS

l-g

7.136

(N-Chloro-1,1,1-trifluoromethane-aminato)-tetrafluoro(trifluoro-methyl)sulfur 0.000 L C 348.00/101.325

1785

290/399

593-77-1 57-bispar 57-bispar Note 11 67-62-9 57-bispar 57-56-7 94-trcnh

539.11/10

320.49/101.325

593-51-1 67-kis 79-dykrep 509-14-8 41-seknit, 52-edw, 19men 41-seknit, 72-finmcc, 19-men

73-sprwri Note 1

56868-57-6 76-yu_shr Note 1 Landolt -Börnst ein New Series IV/20C

Ref. p. 125]

Organic Compounds C0 to C84

Phase Antoine constants A, (n) B [K], (E) C [K], (F)

T-Range [K]

Range [K] Rating

21

Tb [K]/Pb [kPa]

Ref. Note

112 l-g

C2Cl2F2N2 6.715 1612

Dichloro(difluoro-amino) acetonitrile 0.000 238/341 235/343 C

342.30/101.325

l-g

7.14426

38.534

379.14/101.325

117 l-g

C2Cl2F7NS 6.145 1527

(Carboimidic dichloridato)tetra-fluoro(trifluoro-methyl) sulfur 56868-53-2 0.000 L C 368.90/101.325 76-yu_shr Note 1

118 l-g

C2Cl3N 6.26290

Trichloro acetonitrile -43.319 289/357

119 l-g

C2Cl4F4N2 7.265 2248.5

N,N,N’,N’-Tetrachloro-1,1,2,2-tetrafluoro 1,2-ethanediamine 0.000 L C 427.53/101.325

35695-53-5 72-demshr Note 1

120 l-g

C2FNO2 7.825

1750

Fluorocarbonyl isocyanate 0.000 L

300.72/101.325

15435-14-0 74-gle Note 12

121 l-g

C2F2N2O 7.455

1544

Carbonocyanidic amide, difluoro0.000 L C

283.34/101.325

32837-63-1 73-wrishr Note 1

122 l-g

C2F2N2O2 7.385 1762

Difluorocarbon-isocyanatidic amide 0.000 L C

327.55/101.325

32837-64-2 73-wrishr Note 1

123 l-g

C2F2N4O8 10.625 3280.4

1,2-Difluoro-1,1,2,2-tetra-nitroethylene 0.000 297/323 295/325 C

308.74/1

20165-39-3 73-pepleb Note 2

124 l-g

C2F3N 6.17413

749.834

Trifluoroacetonitrile -25.244 204/311

204/315 C

205.13/101.325

125 l-g

C2F3NO 6.963

1176

Trifluoromethyl isocyanate 0.000 195/228

195/238 C

237.23/101.325

460-49-1 55-barhas-3 Note 2

126 l-g

C2F3NO 7.3764

1340

Trifluoro nitrosoethylene 0.000 247/250

246/250 B

249.50/101.325

2713-04-4 60-grihas Note 2

127 l-g

C2F3NOS 6.866 1458

Trifluoromethane-sulfinyl isocyanate 0.000 231/293 231/300 C

299.98/101.325

691-03-2 63-emehaa Note 2

128 l-g

C2F3NOS 7.925 2090

Trifluoromethane sulfinyl cyanide 0.000 L >176 D

353.08/101.325

61951-27-7 77-burshr Note 1

Lando lt -Bö rnst ein New-Series IV/20C

2146.214

1342.393

298/379

295/381 C

285/360 B

D

358.64/101.325

30913-21-4 71-zabshr Note 2 66-lus

545-06-2 54-davjen

353-85-5 57-waijan, 75-mou,72moukay,61pacbob

22

Organic Compounds C0 to C84

Phase Antoine constants A, (n) B [K], (E) C [K], (F)

T-Range [K]

Range [K] Rating

[Ref. p. 125

Tb [K]/Pb [kPa]

Ref. Note

129 l-g

C2F3NO2S 6.31464 1603.268

2,2,2-Trifluoro-N-sulfinyl acetamide 0.000 244/267 242/270

253.90/1

26454-68-2 70-vongle-1

130 l-g

C2F3NO2S2 6.77544 1658.944

Trifluoromethane-sulfonyl isothio-cyanate -37.306 297/385 296/387 B

385.11/101.325

51587-30-5 74-behhaa

131 l-g

C2F3NO3S 6.28338 1206.439

Trifluoromethane-sulfonyl isocyanate -63.414 275/345 273/347 C

345.45/101.325

30227-06-6 74-behhaa

132 l-g

C2F3NS 7.520

Thiocyanic acid, trifluoromethyl ester 0.000 224/294 222/310 D

309.01/101.325

690-24-4 63-emehaa Note 2

133 l-g

C2F3NSSe 6.4469 1741

Trifluoromethane-sulfenyl seleno-cyanate 0.000 263/310 260/320 C

392.01/101.325

21438-06-2 63-emehaa Note 2

134 l-g

C2F3N3O6 9.525 3016.3

1,2,2-Trifluoro-1,1,2-trinitroethane 0.000 313/353 310/360 D

353.82/10

20165-38-2 73-pepleb Note 2

135 l-g

C2F4NO 7.405

1604

(Pentafluoroethyl)-imidosulfuryl fluoride 0.000 L C

297.08/101.325

59617-28-6 76-stamew Note 1

136 l-g

C2F4N2 6.15976

839.099

Tetrafluoroamino-acetic acid, nitrile -39.177 193/241 190/245 D

241.17/101.325

137 l-g

C2F4N2O2S 7.725 2178

[Bis(fluoro-carbonyl)diimido] sulfuryl fluoride 0.000 L>278 278/381 C 380.82/101.325

63697-48-3 77-stamew Note 1

138 l-g

C2F4N2O3 7.058 1503

1,1,2,2-Tetrafluoro-1-nitro-2-nitroso-ethane 0.000 233/293 232/298 C

297.49/101.325

679-08-3 62-birblo Note 2

139 l-g

C2F4N2O4 7.37708 1314.281

1,1,2,2-Tetrafluoro-1,2-dinitro ethane -40.713 260/343 258/345 C

333.02/101.325

356-16-1 57-frasan Note 10

140 l-g

C2F4N2O6S2 8.23195 2443.765

1,2-Bis(fluoro-formyl)-1,2-bis-(fluorosulfonyl) hydrazine 0.000 273/296 270/300 B 296.89/1

19252-50-7 68-nofshr

141 l-g

C2F5NO 6.819

1094

Pentafluoronitroso ethane 0.000 193/227

193/227 C

227.48/101.325

354-72-3 55-barhas-2 Note 2

142 l-g

C2F5NO 6.925

1240

Pentafluoro acetamide 0.000 L

C

252.07/101.325

32822-49-4 73-demshr Note 1

143 l-g

C2F5NOS 7.53157 1859.620

1704

S,S-Difluoro-N-(trifluoroacetyl)-sulfilimine 0.000 240/333 240/338 D

336.35/101.325

5131-88-4 65-dremer

24433-65-6 69-glehal

Landolt -Börnst ein New Series IV/20C

Ref. p. 125]

Organic Compounds C0 to C84

Phase Antoine constants A, (n) B [K], (E) C [K], (F)

T-Range [K]

Range [K] Rating

23

Tb [K]/Pb [kPa]

Ref. Note

144 l-g

C2F5NOS 7.845 2033

Trifluoro-N-(fluoroformyl)-methanesulfin-imidoyl fluoride 0.000 276/323 276/325 C 318.83/50

28103-61-9 57-dun Note 2

145 l-g

C2F5NOS 5.845 1213

Difluorocarbamo-thioic acid, S-(trifluoromethyl) ester 0.000 L 154/316 D 315.94/101.325

32837-66-4 73-wrishr Note 2

146 l-g

C2F5NO4S 3.18961 295.090

(Fluorosulfonyl)(tri-fluoromethoxy)-carbamoyl fluoride -161.210 277/290 275/294 B 279.69/5

19252-49-4 68-nofshr

147 l-g

C2F5N3O3 5096820 1112.141

Diimide, fluoro-(1,1,2,2-tetrafluoro-2-nitroethyl)-, oxide -68.233 257/350 257/350 C 348.90/101.325

755-68-0 63-fraduv

148 l-g

C2F6IN 6.525

1490

N-Iodo-bis-(tri-fluoromethyl amine 0.000 261/318 260/320 D

308.74/50

5764-87-4 66-dobeme Note 2

149 l-g

C2F6N2 6.957

1196

Hexafluoroazo methane 0.000 206/242

205/245 C

241.55/101.325

372-63-4 40-rufwil Note 2

150 l-g

C2F6N2O 4.53570

367.531

Hexafluoroazoxy methane -134.799 275/280

273/282 D

280.07/101.325

151 l-g

C2F6N2O2 6.841 1399

O-Nitroso-N,N-bis(trifluoromethyl) hydroxylamine 0.000 245/285 245/290 C 289.33/101.325

359-75-1 65-dinhas Note 2

152 l-g

C2F6N2O2 6.7009 1329.1

N-Nitroso-O,N-bis(trifluoromethyl) hydroxylamine 0.000 272/283 270/284 C 283.08/101.325

367-54-4 54-janhas-1 Note 2

153 l-g

C2F7N 6.778

1118

Heptafluorodi-methyl amine 0.000 199/230 199/235 C

359-62-6 72-charab Note 2

154 l-g

C2F7N 6.1249

972.7

Perfluorodimethyl-amine 0.0 203/233

199/239 C

155 l-g

C2F7N 6.560

1088

Perfluoroethyl amine 0.000 171/236

171/240 C

156 l-g

C2F7NOS 6.015 1195

S-Fluoro-N,S-bis(trifluoromethyl)sulfoximine 0.000 L D 298.06/101.325

59665-14-4 76-yu_shr-1 Note 1

157 l-g

C2F7NO2S 6.605 1479

O-(Fluorosulfinyl)-N,N-bis(trifluoro-methyl) hydroxyl-amine 0.000 L D 321.58/101.325

21950-99-2 68-lotbab Note 1

Lando lt -Bö rnst ein New-Series IV/20C

234.27/101.325

371-56-2 54-janhas

359-62-8 79-dykrep 238.90/101.325

354-80-3 51-coahar Note 2

24

Organic Compounds C0 to C84

Phase Antoine constants A, (n) B [K], (E) C [K], (F) 158

C2F7NO3S

l-g

7.000

159

C2F7NO12S4

l-g

8.135

160

C2F9NS

l-g

T-Range [K]

Range [K] Rating

[Ref. p. 125

Tb [K]/Pb [kPa]

Ref. Note

Fluorosulfuric acid, 1,1,2,2-tetrafluoro-2-(difluoro-amino)ethyl ester 0.000 L >276 C 325.37/101.325

4188-34-5

53684-02-9

2560

Fluorosulfuric acid-[bis[(fluorosulfonyl)oxy]amino]-2,2,2trifluoroethylidene ester 0.000 L C 417.67/101.325

56868-56-5

7.135

1572

Trifluoro[1,1,1-trifluoromethan-aminato-2-(tri-fluoromethyl)] sulfur 0.000 L C 306.48/101.325

161 l-g

C2F11NS 6.995

1530

[Bis(trifluoro-methyl)amino]pentafluoro sulfur 0.000 233/306 230/310 C 306.66/101.325

13888-13-6 66-dob Note 2

162

C2F14NS

59665-16-6

l-g

6.975

1576

Tetrafluoro(N,1,1,1-tetrafluoromethane-aminato)(trifluoromethyl)sulfur 0.000 L D 317.15/101.325

163 cr-g l-g

C2FeN2O4 8.8419 2467 7.3139 2021

Dicarbonyldi-nitrosyliron 0 272/291 0 297/356

13682-74-1 79-dykrep 79-dykrep

164 l-g

C2HF3N2 7.076

1442

2-Diazo-1,1,1-trifluoro ethane 0.000 L C

284.40/101.325

371-67-5 64-fiehas Note 1

165 l-g

C2HF6N 5.88733

1245.844

Bis(trifluoromethyl) amine -4.684 207/267

259.60/10

371-77-7 40-rufwil, 55-barhas-1

166 l-g

C2HF6NOS 7.305 1830.4

S,S-Bis(trifluoro-methyl)sulfoximine 0.000 L C

345.41/101.325

34556-22-4 72-saushr Note 2

167 l-g

C2HF6NS2 7.505 1905

Bis[(trifluoro-methane)sulfen]-imide 0.000 243/293 242/300 C

292.85/10

763-24-6 60-emenab Note 1

168

C2HF10NS

56868-58-7

l-g

6.045

1352

Tetrafluoro(1,1,1-trifluoromethane-aminato)(trifluoromethyl)sulfur 0.000 L C 334.71/101.325

169 l-g

C2H2FN 7.7211

1992.8

Fluoroacetonitrile 0.000 273/333

503-20-8 48-redcha-1 Note 2

1625

272/295 D 295/356 D

205/269 D

273/351 C

296.50/10

65-lusruf Note 1

75-kirlas Note 1

76-yu_shr Note 1

76-yu_shr-1 Note 1

76-yu_shr Note 1

Landolt -Börnst ein New Series IV/20C

Ref. p. 125]

Organic Compounds C0 to C84

Phase Antoine constants A, (n) B [K], (E) C [K], (F)

25

T-Range [K]

Range [K] Rating

Tb [K]/Pb [kPa]

Ref. Note

287/331 C

308.40/0.1

354-38-1 78-berspi 16276-45-2 67-lus

170 l-g

C2H2F3NO 12.08126 4034.255

Trifluoroacetamide 0.000 288/329

171 l-g

C2H3ClF3N 10.11071 3620.481

N-Chloro-N,1,1-trifluoroethylamine 137.694 220/310 218/310 D

309.00/101.325

172 l-g

C2H3F3N2 7.0009 1377

1,1,1-Trifluoro-azomethane 0.000 240/273

240/276 C

275.67/101.325

173 l-g

C2H3N 6.52111

1492.375

Acetonitrile -24.208 280/354

278/354 B

354.72/101.325

l-g

6.79423

1728.556

6.489

353/530

353/550 C

449.09/1000

75-05-8 66-boy, 71meyren, 65putmce Note 7 99-svo

174 l-g

C2H3NO 4.72962

849.915

Methyl isocyanate -75.984 253/310

252/313 C

303.87/10

624-83-9 78-tavnee

175 cr-g

C2H3NO3 11.7049 5639

Oxalic acid, monoamide 0.000 348/364

340/364 C

359.06/.0001

176 l-g

C2H3NO5 4.29789 635.876

Peroxide, acetyl nitro-126.217 277/330

275/333 D

319.03/10

2278-22-0 78-kacsol

177 l-g

C2H3NS 6.26053

1550.040

Methyl thiocyanate -41.963 259/406

257/410 C

406.27/101.325

556-64-9 47-stu

178 cr-g

C2H3NS 5.27449

1260.304

Methyl isothiocyanate -33.547 238/293

237/301 B

272.49/1

l-g

6.65048

1735.570

-18.439

311/392

308/394 B

392.10/101.325

556-61-6 47-stu, 35baubur 47-stu

179 cr-g

C2H3N3 10.93912

4396.047

1,2,4-Triazol 0.000 281/296

280/300 C

294.26/.0001

288-88-0 99-svo

180 l-g

C2H4ClN3 7.8361 2287.3

1-Chloro-2-azidoethane 0.000 273/337

273/335 C

334.59/10

53422-48-3 48-redcha Note 2

181 l-g

C2H4FNO2 7.555 2000

2-Fluoroethyl nitrite 0.000 273/337

270/335 D

305.11/10

10288-18-3 48-redcha-1 Note 2

182 l-g

C2H4F3N 7.062

2,2,2-Trifluoroethyl amine 0.000 L

C

310.11/101.325

753-90-2 59-bisfin Note 1

183 l-g

C2H4F3NS 7.485 1754

Lando lt -Bö rnst ein New-Series IV/20C

1568

N-Methyl-1,1,1-trifluoromethane sulfenamide 0.000 223/294 221/300 C 270.47/10

690-21-1 65-dinhas Note 2

471-47-6 53-bracle-1 Note 2

62067-12-3 60-emenab Note 2

26

Organic Compounds C0 to C84

Phase Antoine constants A, (n) B [K], (E) C [K], (F)

[Ref. p. 125

T-Range [K]

Range [K] Rating

Tb [K]/Pb [kPa]

Ref. Note

184 cr-g

C2H4N2O2 11.27844 3181.776

Oxalic acid diamide -93.748 354/370

352/374 C

368.53/0.5

185 cr-g

C2H4N2O2 11.69278 6128.720

1,2-Diformyl hydrazine 20.084 340/372

338/375 B

370.46/0.0001

cr-g

9.0291

63.45

395/420

390/425 D

186 l-g

C2H4N2O4 7.81482 2666.271

1,1-Dinitroethane 0.000 318/354

316/356 C

328.53/0.5

187 l-g

C2H4N2O6 7.64894 2446.716

Ethylene glycol dinitrate -43.871 240/390

240/390 D

297.44/0.01

l-g

10.96763

133.688

390/450

390/460 D

453.21/50

628-96-6 77-pel-1, 61lun 61-lun

188 cr-g

C2H4N2S2 11.78936 5478.750

Dithiooxamide -0.381 348/370

347/372 C

370.83/0.001

79-40-3 99-svo

189 cr-g l-g

C2H4N4 14.59684 12.02969

4382.292 3717.940

1-Methyl-1H-tetrazole -4.748 282/315 6.667 315/382

281/315 B 315/384 C

304.97/1 364.24/101.325

16681-77-9 99-svo 99-svo

190 l-g

C2H4N4 7.44210

2280.504

2-Methyl tetrazole -0.331 305/372

304/375 C

354.33/101.325

16681-78-0 99-svo

191 cr-g

C2H4N4 11.18086

4894.950

5-Methyl tetrazole -0.147 323/418

322/420 C

402.00/0.1.

51853-00-0 99-svo

192 cr-g

C2H4N4 11.70744

6450.483

Dicyanodiamide -8.894 420/447

418/450 C

447.48/0.001

461-58-5 99-svo

193 l-g

C2H5D2N 6.34813 1061.77

Ethanamine-d2 -45.996 213/289

203/298 C

290.51/101.325

5852-45-9 84-dykrep

194 l-g

C2H5F2N 6.03634

N,N-Difluoroethyl amine -40.182 241/288

240/292 C

289.96/101.325

758-18-9 60-fra-1

195 l-g

C2H5F3NP 6.36104 1311.91

Amide methyl-(trifluoromethyl)-phosphinite -48.47 238/294 228/304 C

196 l-g

C2H5N 6.72936

1360.964

Ethylene imine -40.198 213/318

212/320 B

277.74/10

197 cr-g l-g

C2H5N 10.94163 6.70068

4066.340 1817.275

Acetamide 0.077 -104.997

272/291 381/491

271/300 C 380/493 C

291.59/0.001 492.07/101.325

60-35-5 99-svo 60-tho

198 l-g

C2H5NO 6.66006

1877.969

N-Methyl-formamide -69.170 370/472

368/475 C

472.66/101.325

123-39-7 61-heiila

199 l-g

C2H5NO 7.33876

1831.677

Acetaldehyde oxime -44.735 288/388

288/390 C

388.20/101.325

107-29-9 47-stu

3981.9

5439.796

1006.754

471-46-5 53-bracle-1 Note 13 628-36-4 99-svo, 56suzoni 94-trcnh 600-40-8 98-dykrep

4669-74-3 84-dykrep 151-56-4 99-svo, 56burgoo

Landolt -Börnst ein New Series IV/20C

Ref. p. 125]

Organic Compounds C0 to C84

Phase Antoine constants A, (n) B [K], (E) C [K], (F)

27

T-Range [K]

Range [K] Rating

Tb [K]/Pb [kPa]

Ref. Note

200 l-g

C2H5NO2 7.18903 2373.843

Methyl carbamate 0.000 333/388

333/390 D

383.56/10

201 l-g

C2H5NO2 7.13913 1511.996

Ethyl nitrite 4.316 203/290

203/392 C

290.22/101.325

202 cr-g

C2H5NO2 13.56112 7100.889

Aminoacetic acid -0.221 405/472

407/475 B

428.99/0.001

203 l-g

C2H5NO2 5.88197 1200.53

Nitroethane -77.348 283/383

273/393 B

387.22/101.325

79-24-3 84-dykrep

204 l-g

C2H5NO3 6.23373 1307.873

Ethyl nitrate -51.480 273/360

272/362 C

360.82/101.325

625-58-1 56-grapra

205 l-g

C2H5NOS 6.59075 1430.211

1,1,2,2,2-Penta-fluoro-N-sulfinyl ethylamine -7.303 245/319 242/321 C

319.23/101.325

10564-50-8 66-lus

206 l-g

C2H5N3 6.83899

Azidoethane 6.310 253/298

251/300 B

264.16/10

871-31-8 64-geikon

207 l-g

C2H5N3O2 6.57800 1774.353

Bis(nitrosomethyl) amine -38.250 276/426

275/427 C

426.32/101.325

900000-15-9 47-stu

208 cr-g

C2H5N3O2 11.4589 6038.9

Biuret -10.15

393/459 C

209 cr-g

C2H5N5 11.96778

6109.312

1-Methyl-5-amino-1H-tetrazole 0.968 379/438 378/440 B

436.42/0.01

5422-44-6 99-svo Note 9

210 cr-g

C2H5N5 12.13420

4715.693

2-Methyl-5-amino-2H-tetrazole -0.604 310/373 308/375 B

334.24/0.01

6154-04-7 99-svo Note 9

211 l-g

C2H6BCl2N 6.10345 1392.6

Dichloro(dimethyl-amino)borane -47.82 283/343 273/353 C

1113-31-1 79-dykrep

212 l-g

C2H6BrF4NS 7.335 1983

Bromotetrafluoro-(N-methyl-methanaminato) sulfur 0.000 L C 372.10/101.325

63324-17-4 77-kitshr Note 1

213 l-g

C2H6ClF4NS 7.225 1874

Chlorotetrafluoro-(N-methyl-methanaminato) sulfur 0.000 L C 259.05/101.325

63324-16-3 77-kitshr Note 1

214 l-g

C2H6DN 6.08554

914.206

Dimethylamine-d -56.723 205/279

195/289 B

917-72-6 84-dykrep

215 l-g

C2H6FN 7.07218

1532.560

Fluorodimethyl amine 0.000 249/273

248/275 C

Lando lt -Bö rnst ein New-Series IV/20C

1579.266

395/457

598-55-0 76-berbou-1 109-95-5 37-thodai, 34-goo-1 56-40-6 15-cra-1, 64clysve, 65svecly Note 5

108-19-0 94-trcnh

252.39/10

14722-43-1 66-wieruf

28

Organic Compounds C0 to C84

Phase Antoine constants A, (n) B [K], (E) C [K], (F)

T-Range [K]

Range [K] Rating

[Ref. p. 125

Tb [K]/Pb [kPa]

Ref. Note

216 l-g

C2H6F3NS 7.43679 2120.387

(Dimethylamino)-sulfur trifluoride 0.000 297/326 295/330 C

329.42/10

217 l-g

C2H6N2 7.90323

1367.554

Dimethyl diimide -1.163 195/273

195/275 B

273.45/101.325

218 l-g

C2H6N2 14.85942

6191.105

Methylammonium cyanide 153.899 250/295

250/297 C

288.82/10

219 l-g

C2H6N2O 6.25499 1515.186

N-Nitrosodimethyl amine -65.955 273/423

272/425 D

422.53/101.325

62-75-9 99-svo, 67korpep

220 cr-g

C2H6N2O 10.72 4562

N-Methyl urea 0.000 326/371

326/371 D

309.92/0.0001

598-50-5 99-svo Note 2

221 cr-g

C2H6N2O2 10.94793 3657.982

N-Nitrodimethyl amine 0.000 314/324

313/326 C

325.18/0.5

4164-28-7 52-bracot Note 7

222 l-g

C2H6N2S 7.19375

1934.607

Dimethylsulfur diimide -0.608 248/298

247/300 B

269.54/1

13849-02-0 66-cohmac Note 9

223 l-g l-g

C2H7N 6.31174 6.31389

1001.852 1027.852

Dimethyl amine -47.342 201/280 -41.417 280/437

200/280 B 280/438 C

280.00/101.325 280.00/101.325

224 l-g l-g

C2H7N 6.434 5.8856

1102.88 840.48

Ethanamine -40.7 220/308 -73.15 308/467

205/296 A 296/4563 B

289.73/101.325

225 l-g l-g

C2H7NO 6.22755 6.73682

1291.785 1752.592

Ethanolamine -134.333 352/489 -66.836 485/613

350/489 D 489/623 C

440.12/101.325 500/83/500

141-43-5 99-svo 99-svo

226 l-g

C2H7NO 6.67933

1409.588

N,N-Dimethyl-hydroxyl amine -71.823 291/363 290/368 B

354.85/50

5725-96-2 57-bispar

227 l-g

C2H7NO 6.53029

1245.58

N-Methoxy-methanamine -40.087 228/316

228 l-g

C2H8ClN 11.29248 5909.339

Dimethyl-ammonium chloride 49.107 478/533 478/533 C

525.03/10

l-g

9.26785

-240.474

533/570 C

568.46/101.325

229 l-g

C2H8ClN 4.09602 1767.273

433/478 C

465.69/2

2381.856

533/570

Ethylammonium chloride 0.000 433/478

3880-03-3 67-demmac 503-28-6 72-ackhal, 39-hentay 500072-40-2 73-diemar

124-40-3 39-asteid 99-svo 75-04-7 86-trcnh 86-trcnh

1117-97-1 73-boufri

218/326 B

506-59-2 67-kis Note 14 67-kis Note 14 557-66-4 67-kisjak Note 15

Landolt -Börnst ein New Series IV/20C

Ref. p. 125]

Organic Compounds C0 to C84

Phase Antoine constants A, (n) B [K], (E) C [K], (F)

29

T-Range [K]

Range [K] Rating

Tb [K]/Pb [kPa]

Ref. Note

242/280 C 283/419 B

266.31/0.1 390.07/101.325

107-15-3 77-matmun 75-mesfin

230 cr-g l-g

C2H8N2 25.88845 6.43971

1,2-Diaminoethane 14731.806 281.577 242/278 1427.523 -68.119 285/418

231 l-g

C2H8N2 6.71944

1390.612

1,1-Dimethyl-hydrazine -40.506 238/293

236/295 B

283.64/10

57-14-7 53-astwoo

232 l-g

C2H8N2 5.15340

7710078

1,2-Dimethyl-hydrazine -113.823 275/297

273/300 B

299.47/10

540-73-8 53-astwoo

233 cr-g

C2H9NSi 12.851

3070

(Dimethylamino)-silane 0 228/264

228/264 D

234 l-g

C2H11B2N 7.46495 1917.35

(Dimethylamino)-diborane(6) 29.58 234/287 224/297 B

235 cr-g l-g

C2N2 8.53784 6.45850

1566.647 1007.146

Cyanogene -10.461 202/245 -25.714 245/399

202/245 B 245/399 C

218.30/10 251.90/101.325

236 l-g

C2N6O12 4.32715

1701.497

Hexanitroethane 10.159 293/343

294/345 B

308.84/0.1

237 l-g

C3BrF6NO 6.9009 1603

N,N-Bis(trifluoro-methyl)carbamoyl bromide 0.000 237/293 233/298 C 271.65/10

2967-12-6 64-emetat Note 2

238

C3BrF10NS

62977-73-5

l-g

6.685

Bromotrifluoro[1,1,1,2,3,3,3-hepta-fluoro-2-propanaminato]sulfur 0.000 L D 324.71/10

239 l-g

C3Br3F6NO 4.845 1510

1,1,1,1',1',1'-Hexa-fluoro-N-(tribromo-methoxy) dimethyl-amine 29528-78-7 0.000 297/338 297/342 C 311.66/1 70-emespa Note 2

240 l-g

C3ClF4NO2 7.625 2083

Carbamic fluoride, chloro(trifluoro-acetyl)0.000 L C

241 l-g

C3ClF6NO2 4.40070 472.255

O-(Chloroformyl)-N,N-bis(trifluoro-methyl) hydroxyl-amine -124.002 227/286 225/290 C 262.87/10

15496-01-2 67-aylcam

242

C3ClF6NOS

39095-51-7

l-g

7.385

1954

1-Chloro-2,2,2-trifluoro-N-sulfinyl-1-(trifluoromethyl)ethanamine 0.000 L C 363.25/101.325

243

C3ClF6NS

38005-18-4

l-g

7.295

1960

Amidosulfenyl chloride, [2,2,2-trifluoro-1-(tri-fluoromethyl)ethylidene] 0.000 L D 370.91/101.325

Lando lt -Bö rnst ein New-Series IV/20C

1846

2875-98-1 84-dykrep 22580-01-4 79-dykrep

370.69/101.325

460-19-5 39-ruegia 16-ter, 39ruegia 918-37-6 63-nobree

77-kitshr Note 1

42016-32-0 73-sprwri Note 1

72-swishr-1 Note 1

72-metshr Note 1

30

Organic Compounds C0 to C84

Phase Antoine constants A, (n) B [K], (E) C [K], (F)

T-Range [K]

Range [K] Rating

[Ref. p. 125

Tb [K]/Pb [kPa]

Ref. Note

244 l-g

C3ClF6NS 6.965 1676.9

Ethanimidoyl chloride, 2,2,2-trifluoro-N-[(tri-fluoromethyl)thio] 62067-05-4 0.000 L C 338.13/101.325 77-burshr-1 Note 1

245 l-g

C3ClF8N 5.73355

949.326

N-Chloro-N,1,2,2,2-pentafluoro-1-trichloro, ethylethylamine -57.231 240/311 240/320 C 311.89/101.325

33757-13-0 71-swizab

246

C3ClF10NS

62977-71-3

l-g

6.465

1747

Chlorotrifluoro(1,1,1,2,3,3,3)-hepta-fluoro-2-propanaminato)sulfur 0.000 L C 391.77/101.325

247

C3ClF10NS

56868-52-1

l-g

6.655

1664

Tetrafluoro-(2,2,2-trifluoroethan-imidoyl chloridato) (trifluoromethyl)-sulfur 0.000 L C 357.90/101.325

248

C3ClF12NS

56868-59-8

l-g

7.145

1882

Tetrafluoro(N-chloro-1,1,2,2,2-pentafluoro-ethanaminato) (trifluoromethyl)-sulfur 0.000 L C 366.20/101.325

249 l-g

C3Cl2F5N 6.955 1629

2,2-Difluoro-1,2-dichloro-N-(tri-fluoromethyl)-ethylidenimine 0.000 283/318 282/329 C 329.14/101.325

500072-41-3 65-banhas Note 2

250 l-g

C3Cl2F6N2 7.265 1830

Bis(trifluoromethyl)hydrazonephosgene 0.000 267/339 267/348 C

13105-65-2 66-dobeme Note 2

251 l-g

C3Cl2F7N 6.39535 895.808

N,N-Dichloro-1,2,2,2-tetrafluoro-1-(trifluoro-methyl)ethylamine 32751-04-5 -88.897 299/343 295/345 C 343.78/101.325 71-swizab

252

C3Cl2F7NS

26454-66-0

l-g

12.72876

S,S-Dichloro-N-[tetrafluoro-1-(trifluoromethyl)ethyl]sulfilimine 290.510 313/347 310/350 C 328.40/10

253 l-g

C3CoNO4 7.097 1787

Tricarbonylnitrosyl-cobalt 0 278/338

278/338 D

14096-82-3 79-dykrep

254 l-g

C3F3N2P 6.66608

1490.55

Dicyano(trifluoro-methyl)phosphine -63.73 291/334 281/344 C

58310-46-6 84-dykrep

255 l-g

C3F3N3 6.54672

1312.065

2,4,6-Trifluoro-1,3,5-triazine -56.944 278/344 270/355 B

345.88/101.325

256 l-g

C3F5N 6.955

1254

2,2-Difluoro-3-(trifluoromethyl) 0.000 193/349 193/250 C

253.37/101.325

3291-42-7 66-banmoo Note 2

257 l-g

C3F5N 6.925

1268

2,3-Difluoro-2-(trifluoromethyl) 0.000 193/248 193/258 C

257.76/101.325

3291-41-6 66-banmoo Note 2

7259.120

347.96/101.325

77-kitshr Note 2

76-yu_shr Note 2

76-yu_shr Note 1

70-vongle-1

675-14-9 59-seebal

Landolt -Börnst ein New Series IV/20C

Ref. p. 125]

Organic Compounds C0 to C84

Phase Antoine constants A, (n) B [K], (E) C [K], (F) 258 l-g

C3F5NO3 7.018

259 l-g

T-Range [K]

Range [K] Rating

31

Tb [K]/Pb [kPa]

Ref. Note

1,1,1,3,3-Penta-fluoro-3-nitro-2-propanone 0.000 284/303 284/307 C

305.65/101.325

3888-00-4 66-bagbir Note 2

C3F6N2OS 6.215 1605.7

N-Cyano-S,S-bis(trifluoromethyl)sulfoxime 0.000 L C

381.47/101.325

34556-28-0 72-saushr Note 1

260 l-g

C3F7N 7.028

1341

1,1,2,2,2-Penta-fluoro-N-(difluoro-methylene)ethyl-amine 0.000 L C 267.01/101.325

428-71-7 61-barhas Note 1

261 l-g

C3F7N 6.346

1119

Perfluoro(ethyl-idenemethylamine) 0.000 L C

257.82/101.325

2802-70-2 61-barhas Note 1

262 l-g

C3F7NO 7.79256

1692.028

Heptafluoro-1-nitrosopropane 29.691 227/262 225/270 C

262.70/101.325

423-26-7 56-masdun, 55-barhas-2

263 l-g

C3F7NO 7.085

1418

Heptafluoro propionamide 0.000 L

279.17/101.325

32822-50-7 71-demshr Note 1

264 l-g

C3F7NO2 4.96192

578.574

Heptafluoro-1-nitropropane -102.726 247/296 245/300 D

298.44/101.325

423-33-6 55-barhas-2, 53-ban

265 l-g

C3F7NO2 4.85269

568.256

O-(Fluoroformyl)-N,N-bis(trifluoro-methyl) hydroxyl-amine -89.398 194/288 193/290 D 289.00/101.325

15496-00-1 67-babshr

266 l-g

C3F7NOS 7.19624 1710.382

1,2,2,2-Tetrafluoro-N-sulfinyl-1-(tri-fluoromethyl) amine -5.173 252/280 250/285 B 281.21/101.325

26454-67-1

267 l-g

C3F7NS 6.815

2,2,2-Trifluoro-N-[(trifluoromethyl)-thiol]ethanimidoyl fluoride 62067-06-5 0.000 L C 304.60/101.325 77-burshr-1 Note 1

268

C3F8N2O2

l-g

7.315

269 l-g 270 l-g

1532

1464.9

C

32837-67-5

1645

N-[(Difluoroamino) carbonyl)oxy]-1,1,1-trifluoro- N(trifluoromethyl)-methanamine 0.000 >170 >170 C 309.83/101.325

C3F9N 6.735

1250

Tris(trifluoro-methyl) amine 0.000 193/263 193/263 C

432-03-1 57-dre Note 2

C3F9NO 7.1565

1410

Lando lt -Bö rnst ein New-Series IV/20C

264.31/101.325

73-wrishr Note 2

1,1,1,1',1',1'-Hexa-fluoro-N-(trifluoro-methoxy)dimethyl-amine 671-63-6 0.000 226/268 226/274 C 273.74/101.325 65-dinhas Note 2

32

Organic Compounds C0 to C84

Phase Antoine constants A, (n) B [K], (E) C [K], (F) 271

C3F9NOS

l-g

6.745

272 l-g

T-Range [K]

Range [K] Rating

[Ref. p. 125

Tb [K]/Pb [kPa]

Ref. Note

[1,2,2,2-Tetrafluoro -1-(trifluoro-methyl)ethyl]imido-sulfuryl fluoride 0.000 L D 315.87/101.325

59617-29-7

C3F9NOS2 6.525 1627.7

S,S-Bis(trifluoro-methyl)-N-[(trifluoromethyl)-thio]sulfoxime 0.000 L C 360.17/101.325

34556-26-8 72-saushr Note 1

273

C3F9NO2S2

34556-27-9

l-g

7.015

1944

S,S-Bis(trifluoro-methyl)-N-[(tri-fluoromethyl)sulfinyl]sulfoxime 0.000 L C 388.08/101.325

274

C3F9NO2S3

29749-02-8

l-g

6.42751

1535.424

1,1,1-Trifluoro-N,N-bis[(trifluoro-methyl)thio]-methane sulfonamide -55.520 288/402 286/404 C 402.76/101.325

275 l-g

C3F9N3O 6.15342

1017.325

N-Nitrosotris-(trifluoromethyl)-hydrazine -59.320 263/304 263/305 D

304.59/101.325

10405-31-9 66-dobeme, 66-hastip

276 l-g

C3F9N3O2 7.0299 1650

Nitrotris(trifluoro-methyl) 0.000 L

328.41/101.325

277

C3F11NO3S2

65844-08-8

l-g

6 275

1695

Trifluoro(fluoro-sulfato) [1,1,1,2,3,3,3-hepta-fluoro-2-propanaminato(2-)]sulfur 0.000 L C 397.02/101.325

278

C3F13NS

59665-17-7

l-g

6.935

1652

Tetrafluoro-(N,1,1, 2,2,2-hexafluoro-ethanaminato) (trifluoromethyl)-sulfur 0.000 L C 335.14/101.325

279 l-g

C3HF6N 7.215

1576

2,2,3-Trifluoro-3-(trifluoromethyl)-aziridine 0.000 268/298 268/303 C

3291-64-3 66-banmoo Note 2

280 l-g

C3HF8NOS 7.285 1891.2

S-(Pentafluoro-ethyl)-S-(trifluoro-methyl)sulfoximine 0.000 L C 358.23/101.325

34556-23-5 61-casray Note 1

281 l-g

C3HF9N2 7.065

1560

Tris(trifluoro-methyl) hydrazine 0.000 238/307 238/308 D

13105-67-4 66-dobeme Note 3

282

C3HF12NS

l-g

6.025

1401

Tetrafluoro-(1,1,2,2,2-penta-fluoroethanaminato) (trifluoromethyl)-sulfur 0.000 L D 348.57/101.325

1497

C

302.54/101.325

308.34/101.325

76-stamew Note 1

72-saushr Note 1

74-behhaa-1

10405-30-8 66-hastip

78-kitshr-1 Note 1

76-yu_shr-1 Note 1

56868-60-1 76-yu_shr Note 1

Landolt -Börnst ein New Series IV/20C

Ref. p. 125]

Organic Compounds C0 to C84

Phase Antoine constants A, (n) B [K], (E) C [K], (F) 283 cr-g l-g

C3HN 9.305 6.665

284 l-g

T-Range [K]

Range [K] Rating

33

Tb [K]/Pb [kPa]

Ref. Note

Cyanoacetylene propargylnitrile 0.000 247/279 245/279 D 0.000 279/315 279/316 C

266.10/10 315.50/101.325

C3H2FNOS 8.1502 2576.8

Fluoroacetyl isothiocyanate 0.000 273/353

281.61/0.1

285 l-g

C3H2F6N2S 7.145 2080.3

2,2,2-Trifluoro-N-[(trifluoromethyl)-thio]ethanimidamid 0.000 322/390 322/390 C 381.98/50

62067-09-8 77-burshr-1 Note 2

286

C3H2F6N2S

38005-20-8

l-g

7.295

2052

[2,2,2-Trifluoro-1-(trifluoromethyl)-ethylidenesulfoxylic diamide 0.000 L C 387.95/101.325

287

C3H2F8N2S

2433-66-7

l-g

11.02949

4762.560

S,S-Difluoro-N-[1-amino-2,2,2-tri-fluoro-1-(trifluoromethyl)ethyl]-sulfimine 161.802 295/312 292/316 B 313.05/10

288 cr-g

C3H2N2 10.91929

3787.084

Malononitrile 0.000 260/282

109-77-3 67-boyguh

289 l-g

C3H3F6NOS 6.745 1602.5

N-Methyl-S,S-bis(trifluoromethyl)sulfoximine 0.000 L C 338.13/101.325

34556-25-7 72-saushr Note 1

290 l-g

C3H3F6NO2S2 7.155 2275

1,1,1,1',1',1'-Hexa-fluoro-N-methyl-dimethane sulfinamide 0.000 L C 388/69/20

30957-47-2 71-saushr Note 1

291 l-g

C3H3F6NS 7.025 1625

N,N-Bis(trifluoro-methyl)methane-sulfenamide 0.000 269/309 269/315 C 323.75/101.325

13105-12-9 66-emetat Note 2

292

C3H3F7N2S

59665-15-5

l-g

6.475

1510

Sulfur, fluoro-(methanaminato)-(trifluoromethyl) (trifluoromethanaminato)0.000 L C 337.86/101.325

293 l-g

C3H3N 4.91748

706.474

Acrylonitrile -109.392 283/353

283/353 A

352.02/101.325

107-13-1 99-svo

294 l-g

C3H3NO 6.31572

1258.183

Oxazole -50.771

290/353 A

342.69/101.325

288-42-6 75-soubar

295 l-g

C3H3NO2 7.5682 2053.6

Cyanoformic acid, methyl ester 0.000 273/333 270/335 B

294.71/10

17640-15-2 48-redcha

296 l-g

C3H3NS 6.26564

Thiazole -57.015

391.37/101.325

288-47-1 75-soubar

Lando lt -Bö rnst ein New-Series IV/20C

2210 1470

1424.308

293/344

334/393

273/353 D

260/284 D

230/398 B

272.07/0.001

1070-71-9 63-danflu 63-danflu 459-71-2 48-redcha-1 Note 2

72-metshr Note 1

69-glehal

76-yu_shr-1 Note 1

34

Organic Compounds C0 to C84

Phase Antoine constants A, (n) B [K], (E) C [K], (F)

[Ref. p. 125

T-Range [K]

Range [K] Rating

Tb [K]/Pb [kPa]

Ref. Note

297 cr-g cr-g

C3H3N3 10.41362 8.93474

3085.464 2438.310

1,3,5-Triazine 1.605 212/228 -24.113 297/334

212/230 C 228/338 B

228.42/0.001 228.42/0.001

290-87-9 99-svo 99-svo

298 cr-g

C3H3N3O3 11.62249 6922.277

Cyanuric acid 2.576 440/470

440/472 C

470.82/0.001

108-80-5 99-svo

299 l-g

C3H4Cl3NSi 5.29199 1172.73

Trichloro(2-cyanoethyl)silane -133.61 342/442 332/452 C

1071-22-3 84-dykrep

300 l-g

C3H4F5NSe 6.945 1765

1,1,2,2,2-Pentafluoro-N-methyl-ethane selenamide 0.000 243/318 243/325 D 357.34/101.325

6123-53-1 65-welreg Note 2

301 cr-g

C3H4N2 10.82418

3729.991

1H-Pyrazole -1.824 253/272

251/275 C

271.64/0.001

288-13-1 99-svo

302 cr-g cr-g

C3H4N2 10.42044 11.00

4100.953 4337.7

Imidazole -4.324 0.000

289/310