Compound Information 

Name: 1-butylurea
Formula: C5H12N2O
Molar Mass: 116.164
Additional Names: N-butylurea
monobutylurea
urea, monobutyl-
butyl urea
urea, N-butyl-
butylurea
urea, butyl-
Image of 1-butylurea

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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
    • Triple point temperature (Crystal 3, Crystal 2, and Gas)
      3 experimental data points
    • Triple point temperature (Crystal 3, Crystal 2, and Liquid)
      1 experimental data points
    • Triple point temperature (Crystal 2, Crystal 1, and Liquid)
      1 experimental data points
    • Triple point temperature (Crystal 1, Liquid, and Gas)
      4 experimental data points
    • Triple point temperature (Crystal 2, Crystal 1, and Gas)
      3 experimental data points
  • Critical temperature (Liquid and Gas)
    • Critical density (Liquid and Gas)
      • Density (Liquid in equilibrium with Gas) as a function of Temperature
        Temperature from 369.46 K to 789 K
        • Enthalpy of phase transition
          • Enthalpy of phase transition (Crystal 3 to Crystal 2 in equilibrium with Liquid)
            1 experimental data points
          • Enthalpy of phase transition (Crystal 2 to Crystal 1 in equilibrium with Liquid)
            1 experimental data points
          • Enthalpy of phase transition (Crystal 3 to Crystal 2 in equilibrium with Gas)
            3 experimental data points
          • Enthalpy of phase transition (Crystal 2 to Crystal 1 in equilibrium with Gas)
            3 experimental data points
          • Enthalpy of phase transition (Crystal 1 to Liquid in equilibrium with Gas)
            3 experimental data points
        • Enthalpy of vaporization or sublimation (Crystal 1 to Gas) as a function of Temperature
          Temperature from 350 K to 357.977 K
          4 experimental data points
          • Heat capacity at saturation pressure
            • Heat capacity at saturation pressure (Crystal 3 in equilibrium with Gas) as a function of Temperature
              Temperature from 6 K to 294.1 K
              50 experimental data points
            • Heat capacity at saturation pressure (Crystal 2 in equilibrium with Gas) as a function of Temperature
              Temperature from 294.1 K to 315.17 K
              31 experimental data points
            • Heat capacity at saturation pressure (Crystal 1 in equilibrium with Gas) as a function of Temperature
              Temperature from 344.88 K to 369.46 K
              3 experimental data points
          • Heat capacity at constant pressure (Ideal Gas) as a function of Temperature
            Temperature from 200 K to 1500 K
            • Enthalpy
              • Enthalpy (Crystal 3 in equilibrium with Gas) as a function of Temperature
                Temperature from 6 K to 294.1 K
              • Enthalpy (Crystal 2 in equilibrium with Gas) as a function of Temperature
                Temperature from 294.1 K to 315.17 K
              • Enthalpy (Ideal Gas) as a function of Temperature
                Temperature from 200 K to 1500 K
            • Entropy
              • Entropy (Crystal 3 in equilibrium with Gas) as a function of Temperature
                Temperature from 6 K to 294.1 K
              • Entropy (Crystal 2 in equilibrium with Gas) as a function of Temperature
                Temperature from 294.1 K to 315.17 K
              • Entropy (Ideal Gas) as a function of Temperature and Pressure
                Temperature from 200 K to 1500 K
            • Enthalpy of formation (Crystal)
              2 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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