Compound Information 

Name: iodomethane
Formula: CH3I
Molar Mass: 141.93947
Additional Names: methyl iodide
Image of iodomethane

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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 most-constraining points are reported)

  • Triple point temperature (Crystal 1, Liquid, and Gas)
    2 experimental data points
    • Normal boiling temperature (Liquid and Gas)
      • Critical temperature (Liquid and Gas)
        • Critical pressure (Liquid and Gas)
          • Boiling temperature (Liquid in equilibrium with Gas) as a function of Pressure
            Pressure from 0.262468 kPa to 6353.63 kPa
            • Phase boundary pressure
              • Phase boundary pressure (Liquid in equilibrium with Gas) as a function of Temperature
                Temperature from 207.5 K to 527.8 K
                46 experimental data points
              • Phase boundary pressure (Crystal 1 in equilibrium with Gas) as a function of Temperature
                Temperature from 176.213 K to 207.5 K
                50 experimental data points
            • Critical density (Liquid and Gas)
              • Density
                • Density (Liquid in equilibrium with Gas) as a function of Temperature
                  Temperature from 207.5 K to 527.8 K
                  42 experimental data points
                • Density (Liquid) as a function of Temperature and Pressure
                  Temperature from 253.105 K to 313.09 K
                  Pressure from 0.2 kPa to 159505 kPa
                  48 experimental data points
                • Density (Gas) as a function of Temperature and Pressure
                  Temperature from 183.104 K to 516.479 K
                  Pressure from 0.0009 kPa to 864.955 kPa
                  7 experimental data points
                • Density (Gas in equilibrium with Liquid) as a function of Temperature
                  Temperature from 414.95 K to 527.8 K
              • Enthalpy of vaporization or sublimation
                • Enthalpy of vaporization or sublimation (Liquid to Gas) as a function of Temperature
                  Temperature from 207.5 K to 527.8 K
                  4 experimental data points
                • Enthalpy of vaporization or sublimation (Crystal 1 to Gas) as a function of Temperature
                  Temperature from 176.213 K to 207.5 K
              • Heat capacity at saturation pressure (Liquid in equilibrium with Gas) as a function of Temperature
                Temperature from 207.5 K to 517.244 K
                23 experimental data points
                • Heat capacity at constant pressure (Ideal Gas) as a function of Temperature
                  Temperature from 100 K to 1500 K
                  • Enthalpy
                    • Enthalpy (Liquid in equilibrium with Gas) as a function of Temperature
                      Temperature from 207.5 K to 517.244 K
                    • Enthalpy (Ideal Gas) as a function of Temperature
                      Temperature from 100 K to 1500 K
                  • Entropy
                    • Entropy (Ideal Gas) as a function of Temperature and Pressure
                      Temperature from 100 K to 1500 K
                    • Entropy (Liquid in equilibrium with Gas) as a function of Temperature
                      Temperature from 207.5 K to 517.244 K
                  • Speed of sound (Liquid) as a function of Temperature and Pressure
                    Temperature from 253.216 K to 308.181 K
                    Pressure from 0.008 kPa to 8079 kPa
                    19 experimental data points
                    • Refractive index (Liquid) as a function of Wavelength, Temperature, and Pressure
                      Wavelength from 404.661 nm to 759.37 nm
                      Temperature from 289.141 K to 303.143 K
                      21 experimental data points
                      • Viscosity
                        • Viscosity (Liquid in equilibrium with Gas) as a function of Temperature
                          Temperature from 220 K to 520 K
                          14 experimental data points
                        • Viscosity (Gas) as a function of Temperature and Pressure
                          Temperature from 320 K to 790 K
                      • Thermal conductivity
                        • Thermal conductivity (Gas) as a function of Temperature and Pressure
                          Temperature from 317.979 K to 790 K
                          4 experimental data points
                        • Thermal conductivity (Liquid in equilibrium with Gas) as a function of Temperature
                          Temperature from 210 K to 470 K
                      • Enthalpy of formation
                        • Enthalpy of formation (Gas)
                        • Enthalpy of formation (Liquid)
                          1 experimental data points

                      About WTT 

                      NIST/TRC Web Thermo Tables (WTT)
                      NIST Standard Reference Subscription Database 3 - Professional Edition
                      Version 2-2012-1-Pro

                      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 80305-3337

                      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 high-quality 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.

                      Distributed by:
                      Standard Reference Data Program
                      National Institute of Standards and Technology
                      Gaithersburg MD 20899

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