Compound Information 

Name: iodine
Formula: I2
Molar Mass: 253.80894
Image of iodine

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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)
    • Normal boiling temperature (Liquid and Gas)
      • Critical temperature (Liquid and Gas)
        1 experimental data points
        • Critical pressure (Liquid and Gas)
          • Boiling temperature (Liquid in equilibrium with Gas) as a function of Pressure
            Pressure from 58.3782 kPa to 7691.86 kPa
            • Phase boundary pressure (Liquid in equilibrium with Gas) as a function of Temperature
              Temperature from 386.75 K to 710 K
              1 experimental data points
              • Critical density (Liquid and Gas)
                • Density
                  • Density (Liquid in equilibrium with Gas) as a function of Temperature
                    Temperature from 386.75 K to 710 K
                    3 experimental data points
                  • Density (Gas) as a function of Temperature and Pressure
                    Temperature from 217.972 K to 693.841 K
                    Pressure from 0.001 kPa to 1045.46 kPa
                  • Density (Gas in equilibrium with Liquid) as a function of Temperature
                    Temperature from 569.616 K to 710 K
                • Enthalpy of vaporization or sublimation
                  • Enthalpy of vaporization or sublimation (Crystal 1 to Gas) as a function of Temperature
                    Temperature from 298.15 K to 313.15 K
                    2 experimental data points
                  • Enthalpy of vaporization or sublimation (Liquid to Gas) as a function of Temperature
                    Temperature from 386.75 K to 710 K
                • Heat capacity at saturation pressure (Crystal 1 in equilibrium with Gas) as a function of Temperature
                  Temperature from 0.0004 K to 386.75 K
                  50 experimental data points
                  • Heat capacity at constant pressure (Ideal Gas) as a function of Temperature
                    Temperature from 50 K to 5000 K
                    • Enthalpy
                      • Enthalpy (Crystal 1 in equilibrium with Gas) as a function of Temperature
                        Temperature from 0.0003 K to 329.974 K
                        40 experimental data points
                      • Enthalpy (Crystal 1 in equilibrium with Gas) as a function of Temperature
                        Temperature from 0.0004 K to 386.75 K
                      • Enthalpy (Ideal Gas) as a function of Temperature
                        Temperature from 50 K to 5000 K
                    • Entropy
                      • Entropy (Crystal 1 in equilibrium with Gas) as a function of Temperature
                        Temperature from 0.0004 K to 386.75 K
                        2 experimental data points
                      • Entropy (Ideal Gas) as a function of Temperature and Pressure
                        Temperature from 50 K to 5000 K
                    • Viscosity
                      • Viscosity (Liquid in equilibrium with Gas) as a function of Temperature
                        Temperature from 389.077 K to 700 K
                        17 experimental data points
                      • Viscosity (Gas) as a function of Temperature and Pressure
                        Temperature from 410 K to 1060 K
                    • Thermal conductivity
                      • Thermal conductivity (Gas) as a function of Temperature and Pressure
                        Temperature from 410 K to 1060 K
                      • Thermal conductivity (Liquid in equilibrium with Gas) as a function of Temperature
                        Temperature from 390 K to 630 K

                    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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