Compound Information 

Name: 1,3-dimethyl-2,4-(1H,3H)-pyrimidinedione
Formula: C6H8N2O2
Molar Mass: 140.142
Additional Names: 1,3-dimethyluracil
2,4(1H,3H)-pyrimidinedione, 1,3-dimethyl-
Image of 1,3-dimethyl-2,4-(1H,3H)-pyrimidinedione
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Property Availability 

For this compound, WTT contains critically evaluated recommendations for:

  • Triple point temperature (Crystal 1, Liquid, and Gas)
    1 experimental data points
    • Critical temperature (Liquid and Gas)
      • Phase boundary pressure (Crystal 1 in equilibrium with Gas) as a function of Temperature
        Temperature from 311 K to 392.47 K
        28 experimental data points
        • Density (Liquid in equilibrium with Gas) as a function of Temperature
          Temperature from 392.47 K to 810 K
          7 experimental data points
          • Enthalpy of phase transition (Crystal 1 to Liquid in equilibrium with Gas)
            1 experimental data points
            • Enthalpy of vaporization or sublimation (Crystal 1 to Gas) as a function of Temperature
              Temperature from 311 K to 392.47 K
              • Heat capacity at saturation pressure (Crystal 1 in equilibrium with Gas) as a function of Temperature
                Temperature from 298.15 K to 343.15 K
                10 experimental data points
                • Enthalpy of formation
                  • Enthalpy of formation (Gas)
                  • Enthalpy of formation (Crystal)
                    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.

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                National Institute of Standards and Technology
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