Compound Information


Property Availability
For this compound, WTT contains critically evaluated recommendations for:
(Please note that if more than 50 points are used for
regression, only the 50 mostconstraining points are reported)
 Triple point temperature
 Triple point temperature (Crystal 1, Liquid, and Gas)
18 experimental data points  Triple point temperature (Crystal 2, Crystal 1, and Gas)
2 experimental data points
 Triple point temperature (Crystal 1, Liquid, and Gas)
 Normal boiling temperature (Liquid and Gas)
 Critical temperature (Liquid and Gas)
20 experimental data points  Critical pressure (Liquid and Gas)
8 experimental data points  Boiling temperature (Liquid in equilibrium with Gas) as a function of Pressure
Pressure from 0.00232649 kPa to 4700 kPa  Phase boundary pressure (Liquid in equilibrium with Gas) as a function of Temperature
Temperature from 178.5 K to 508.1 K
50 experimental data points  Critical density (Liquid and Gas)
5 experimental data points  Density
 Density (Liquid in equilibrium with Gas) as a function of Temperature
Temperature from 178.5 K to 508.1 K
50 experimental data points  Density (Liquid) as a function of Temperature and Pressure
Temperature from 178.5 K to 508.1 K
Pressure from 0.7 kPa to 700000 kPa
50 experimental data points  Density (Gas in equilibrium with Liquid) as a function of Temperature
Temperature from 178.5 K to 508.1 K
37 experimental data points  Density (Gas) as a function of Temperature and Pressure
Temperature from 178.5 K to 550 K
Pressure from 0.7 kPa to 4690 kPa
47 experimental data points
 Density (Liquid in equilibrium with Gas) as a function of Temperature
 Isobaric coefficient of expansion
 Isobaric coefficient of expansion (Liquid) as a function of Temperature and Pressure
Temperature from 178.5 K to 508.1 K
Pressure from 0.7 kPa to 700000 kPa  Isobaric coefficient of expansion (Gas) as a function of Temperature and Pressure
Temperature from 178.5 K to 550 K
Pressure from 0.7 kPa to 4690 kPa
 Isobaric coefficient of expansion (Liquid) as a function of Temperature and Pressure
 Isothermal compressibility
 Isothermal compressibility (Liquid) as a function of Temperature and Pressure
Temperature from 178.5 K to 508.1 K
Pressure from 0.7 kPa to 700000 kPa
23 experimental data points  Isothermal compressibility (Gas) as a function of Temperature and Pressure
Temperature from 178.5 K to 550 K
Pressure from 0.7 kPa to 4690 kPa
 Isothermal compressibility (Liquid) as a function of Temperature and Pressure
 Thermal pressure coefficient
 Thermal pressure coefficient (Liquid) as a function of Temperature and Pressure
Temperature from 178.5 K to 508.1 K
Pressure from 0.7 kPa to 700000 kPa  Thermal pressure coefficient (Gas) as a function of Temperature and Pressure
Temperature from 178.5 K to 550 K
Pressure from 0.7 kPa to 4690 kPa
 Thermal pressure coefficient (Liquid) as a function of Temperature and Pressure
 2nd virial coefficient (Gas) as a function of Temperature
Temperature from 178.5 K to 550 K
43 experimental data points  3rd virial coefficient (Gas) as a function of Temperature
Temperature from 178.5 K to 550 K
4 experimental data points  Enthalpy of phase transition
 Enthalpy of phase transition (Crystal 1 to Liquid in equilibrium with Gas)
6 experimental data points  Enthalpy of phase transition (Crystal 2 to Crystal 1 in equilibrium with Gas)
2 experimental data points
 Enthalpy of phase transition (Crystal 1 to Liquid in equilibrium with Gas)
 Enthalpy of vaporization or sublimation (Liquid to Gas) as a function of Temperature
Temperature from 178.5 K to 508.1 K
17 experimental data points  Heat capacity at saturation pressure
 Heat capacity at saturation pressure (Crystal 1 in equilibrium with Gas) as a function of Temperature
Temperature from 126 K to 178.2 K
21 experimental data points  Heat capacity at saturation pressure (Liquid in equilibrium with Gas) as a function of Temperature
Temperature from 178.5 K to 508 K
10 experimental data points  Heat capacity at saturation pressure (Crystal 2 in equilibrium with Gas) as a function of Temperature
Temperature from 18 K to 126 K
25 experimental data points
 Heat capacity at saturation pressure (Crystal 1 in equilibrium with Gas) as a function of Temperature
 Heat capacity at constant pressure
 Heat capacity at constant pressure (Liquid) as a function of Temperature and Pressure
Temperature from 178.5 K to 508.1 K
Pressure from 0.7 kPa to 700000 kPa
50 experimental data points  Heat capacity at constant pressure (Ideal Gas) as a function of Temperature
Temperature from 200 K to 1500 K
15 experimental data points  Heat capacity at constant pressure (Gas) as a function of Temperature and Pressure
Temperature from 178.5 K to 550 K
Pressure from 0.7 kPa to 4690 kPa
42 experimental data points
 Heat capacity at constant pressure (Liquid) as a function of Temperature and Pressure
 Enthalpy
 Enthalpy (Crystal 2 in equilibrium with Gas) as a function of Temperature
Temperature from 18 K to 126 K  Enthalpy (Crystal 1 in equilibrium with Gas) as a function of Temperature
Temperature from 126 K to 178.2 K  Enthalpy (Liquid in equilibrium with Gas) as a function of Temperature
Temperature from 178.2 K to 497.905 K  Enthalpy (Ideal Gas) as a function of Temperature
Temperature from 200 K to 1500 K
 Enthalpy (Crystal 2 in equilibrium with Gas) as a function of Temperature
 Entropy
 Entropy (Liquid in equilibrium with Gas) as a function of Temperature
Temperature from 178.5 K to 508.1 K
2 experimental data points  Entropy (Ideal Gas) as a function of Temperature and Pressure
Temperature from 200 K to 1500 K
15 experimental data points  Entropy (Crystal 2 in equilibrium with Gas) as a function of Temperature
Temperature from 18 K to 126 K  Entropy (Crystal 1 in equilibrium with Gas) as a function of Temperature
Temperature from 126 K to 178.2 K
 Entropy (Liquid in equilibrium with Gas) as a function of Temperature
 Adiabatic compressibility
 Adiabatic compressibility (Liquid) as a function of Temperature and Pressure
Temperature from 178.5 K to 508.1 K
Pressure from 0.7 kPa to 700000 kPa
50 experimental data points  Adiabatic compressibility (Gas) as a function of Temperature and Pressure
Temperature from 178.5 K to 550 K
Pressure from 0.7 kPa to 4690 kPa
 Adiabatic compressibility (Liquid) as a function of Temperature and Pressure
 Pressure coefficient of enthalpy
 Pressure coefficient of enthalpy (Gas) as a function of Temperature and Pressure
Temperature from 178.5 K to 550 K
Pressure from 0.7 kPa to 4690 kPa
50 experimental data points  Pressure coefficient of enthalpy (Liquid) as a function of Temperature and Pressure
Temperature from 178.5 K to 508.1 K
Pressure from 0.7 kPa to 700000 kPa
 Pressure coefficient of enthalpy (Gas) as a function of Temperature and Pressure
 JouleThomson coefficient (Gas) as a function of Temperature and Pressure
Temperature from 178.5 K to 550 K
Pressure from 0.7 kPa to 4690 kPa  Speed of sound
 Speed of sound (Liquid) as a function of Temperature and Pressure
Temperature from 178.5 K to 508.1 K
Pressure from 0.7 kPa to 700000 kPa
50 experimental data points  Speed of sound (Liquid in equilibrium with Gas) as a function of Temperature
Temperature from 178.5 K to 508.1 K
50 experimental data points  Speed of sound (Gas) as a function of Temperature and Pressure
Temperature from 178.5 K to 550 K
Pressure from 0.7 kPa to 4690 kPa  Speed of sound (Gas in equilibrium with Liquid) as a function of Temperature
Temperature from 178.5 K to 508.1 K
 Speed of sound (Liquid) as a function of Temperature and Pressure
 Refractive index (Liquid) as a function of Wavelength, Temperature, and Pressure
Wavelength from 435.8 nm to 759.37 nm
Temperature from 288.141 K to 318.15 K
50 experimental data points  Surface tension (Liquid in equilibrium with Gas) as a function of Temperature
Temperature from 178.5 K to 508.1 K
41 experimental data points  Viscosity
 Viscosity (Liquid in equilibrium with Gas) as a function of Temperature
Temperature from 178.5 K to 508 K
50 experimental data points  Viscosity (Liquid) as a function of Temperature and Pressure
Temperature from 178.5 K to 508.1 K
Pressure from 0.7 kPa to 700000 kPa
50 experimental data points  Viscosity (Gas) as a function of Temperature and Pressure
Temperature from 178.5 K to 550 K
Pressure from 0.7 kPa to 4690 kPa
17 experimental data points
 Viscosity (Liquid in equilibrium with Gas) as a function of Temperature
 Thermal conductivity
 Thermal conductivity (Liquid) as a function of Temperature and Pressure
Temperature from 178.5 K to 508.1 K
Pressure from 0.7 kPa to 700000 kPa
19 experimental data points  Thermal conductivity (Gas) as a function of Temperature and Pressure
Temperature from 178.5 K to 550 K
Pressure from 0.7 kPa to 4690 kPa
41 experimental data points  Thermal conductivity (Liquid in equilibrium with Gas) as a function of Temperature
Temperature from 178.5 K to 508 K
20 experimental data points
 Thermal conductivity (Liquid) as a function of Temperature and Pressure
 Enthalpy of formation
 Enthalpy of formation (Gas)
 Enthalpy of formation (Liquid)
About WTT
NIST/TRC Web Thermo Tables (WTT)
NIST Standard Reference Subscription Database 3  Professional Edition
Version 220121Pro
This web application provides access to a collection of critically evaluated thermodynamic property data for pure compounds with a primary focus on organics. These data were generated through dynamic data analysis, as implemented in the NIST ThermoData Engine software package [1, 2, 3, 4, 5, 6]. Some critically evaluated data from the historical TRC Thermodynamic Tables archive [7, 8] are included, also. As of May 2012, the Professional Edition contains information on 28432 compounds and total of 531486 evaluated data points. The properties covered by both versions (32 total) are described in Properties and Implemented Models.
Developed by Kenneth Kroenlein, Chris D. Muzny, Andrei F. Kazakov, Vladimir Diky, Robert D. Chirico, Joseph W. Magee, Ilmutdin Abdulagatov and Michael Frenkel.
Thermodynamics Research Center (TRC)
Thermophysical Properties Division
National Institute of Standards and Technology
Boulder CO 803053337
Questions and comments should be addressed to Dr. Michael Frenkel .
DISCLAIMER: The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a highquality copy of the database and to verify that the methods and data contained therein have been selected on the basis of sound scientific judgement. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the program and database.
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