Compound Information 

Name: octamethyltrisiloxane
Formula: C8H24O2Si3
Molar Mass: 236.533
Additional Names: trisiloxane, octamethyl-
Image of octamethyltrisiloxane

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Property Availability 

For this compound, WTT contains critically evaluated recommendations for:

  • Normal boiling temperature (Liquid and Gas)
    • Critical temperature (Liquid and Gas)
      1 experimental data points
      • Critical pressure (Liquid and Gas)
        1 experimental data points
        • Boiling temperature (Liquid in equilibrium with Gas) as a function of Pressure
          Pressure from 7.99112e-007 kPa to 1415 kPa
          • Phase boundary pressure (Liquid in equilibrium with Gas) as a function of Temperature
            Temperature from 187.2 K to 564.09 K
            43 experimental data points
            • Critical density (Liquid and Gas)
              • Density
                • Density (Gas) as a function of Temperature and Pressure
                  Temperature from 187.2 K to 673 K
                  Pressure from 0.03 kPa to 1415.7 kPa
                  36 experimental data points
                • Density (Liquid) as a function of Temperature and Pressure
                  Temperature from 187.2 K to 564.12 K
                  Pressure from 0.03 kPa to 30000 kPa
                  17 experimental data points
                • Density (Liquid in equilibrium with Gas) as a function of Temperature
                  Temperature from 187.2 K to 564.09 K
                  44 experimental data points
                • Density (Gas in equilibrium with Liquid) as a function of Temperature
                  Temperature from 187.2 K to 564.09 K
                  18 experimental data points
              • Isobaric coefficient of expansion
                • Isobaric coefficient of expansion (Liquid) as a function of Temperature and Pressure
                  Temperature from 187.2 K to 564.12 K
                  Pressure from 0.03 kPa to 30000 kPa
                • Isobaric coefficient of expansion (Gas) as a function of Temperature and Pressure
                  Temperature from 187.2 K to 673 K
                  Pressure from 0.03 kPa to 1415.7 kPa
              • Isothermal compressibility
                • Isothermal compressibility (Liquid) as a function of Temperature and Pressure
                  Temperature from 187.2 K to 564.12 K
                  Pressure from 0.03 kPa to 30000 kPa
                • Isothermal compressibility (Gas) as a function of Temperature and Pressure
                  Temperature from 187.2 K to 673 K
                  Pressure from 0.03 kPa to 1415.7 kPa
              • Thermal pressure coefficient
                • Thermal pressure coefficient (Liquid) as a function of Temperature and Pressure
                  Temperature from 187.2 K to 564.12 K
                  Pressure from 0.03 kPa to 30000 kPa
                  15 experimental data points
                • Thermal pressure coefficient (Gas) as a function of Temperature and Pressure
                  Temperature from 187.2 K to 673 K
                  Pressure from 0.03 kPa to 1415.7 kPa
              • 2nd virial coefficient (Gas) as a function of Temperature
                Temperature from 187.2 K to 673 K
                6 experimental data points
                • 3rd virial coefficient (Gas) as a function of Temperature
                  Temperature from 187.2 K to 673 K
                  • Enthalpy of vaporization or sublimation (Liquid to Gas) as a function of Temperature
                    Temperature from 187.2 K to 564.09 K
                    • Heat capacity at saturation pressure (Liquid in equilibrium with Gas) as a function of Temperature
                      Temperature from 187.2 K to 563.9 K
                      • Heat capacity at constant pressure
                        • Heat capacity at constant pressure (Liquid) as a function of Temperature and Pressure
                          Temperature from 187.2 K to 564.12 K
                          Pressure from 0.03 kPa to 30000 kPa
                        • Heat capacity at constant pressure (Gas) as a function of Temperature and Pressure
                          Temperature from 187.2 K to 673 K
                          Pressure from 0.03 kPa to 1415.7 kPa
                      • Adiabatic compressibility
                        • Adiabatic compressibility (Liquid) as a function of Temperature and Pressure
                          Temperature from 187.2 K to 564.12 K
                          Pressure from 0.03 kPa to 30000 kPa
                        • Adiabatic compressibility (Gas) as a function of Temperature and Pressure
                          Temperature from 187.2 K to 673 K
                          Pressure from 0.03 kPa to 1415.7 kPa
                      • Pressure coefficient of enthalpy (Liquid) as a function of Temperature and Pressure
                        Temperature from 187.2 K to 564.12 K
                        Pressure from 0.03 kPa to 30000 kPa
                        • Joule-Thomson coefficient (Gas) as a function of Temperature and Pressure
                          Temperature from 187.2 K to 673 K
                          Pressure from 0.03 kPa to 1415.7 kPa
                          • Speed of sound
                            • Speed of sound (Liquid in equilibrium with Gas) as a function of Temperature
                              Temperature from 187.2 K to 564.09 K
                            • Speed of sound (Liquid) as a function of Temperature and Pressure
                              Temperature from 187.2 K to 564.12 K
                              Pressure from 0.03 kPa to 30000 kPa
                            • Speed of sound (Gas in equilibrium with Liquid) as a function of Temperature
                              Temperature from 187.2 K to 564.09 K
                            • Speed of sound (Gas) as a function of Temperature and Pressure
                              Temperature from 187.2 K to 673 K
                              Pressure from 0.03 kPa to 1415.7 kPa
                          • Refractive index (Liquid in equilibrium with Gas) as a function of Wavelength and Temperature
                            1 experimental data points
                            • Viscosity
                              • Viscosity (Gas) as a function of Temperature and Pressure
                                Temperature from 187.2 K to 673 K
                                Pressure from 0.03 kPa to 1415.7 kPa
                                2 experimental data points
                              • Viscosity (Liquid) as a function of Temperature and Pressure
                                Temperature from 187.2 K to 564.117 K
                                Pressure from 0.03 kPa to 30000 kPa
                                4 experimental data points
                              • Viscosity (Liquid in equilibrium with Gas) as a function of Temperature
                                Temperature from 187.2 K to 563.9 K
                                2 experimental data points
                            • Thermal conductivity
                              • Thermal conductivity (Gas) as a function of Temperature and Pressure
                                Temperature from 187.2 K to 673 K
                                Pressure from 0.03 kPa to 1415.7 kPa
                              • Thermal conductivity (Liquid) as a function of Temperature and Pressure
                                Temperature from 187.2 K to 564.117 K
                                Pressure from 0.03 kPa to 30000 kPa
                              • Thermal conductivity (Liquid in equilibrium with Gas) as a function of Temperature
                                Temperature from 187.2 K to 563.9 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.

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                            National Institute of Standards and Technology
                            Gaithersburg MD 20899

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