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Properties of hexamethylphosphoramide

Thermophysical properties for hexamethylphosphoramide (CAS: 680-31-9). Use the selector below to view properties in different unit systems.

Calculation Conditions

The following state-dependent properties were calculated at these standard conditions.

Temperature

25 °C

Pressure

1.01325 bar

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Identification

  • Atoms
    C: 6, H: 18, N: 3, O: 1, P: 1
  • CAS
    680-31-9
  • Formula
    C6H18N3OP
  • ID
    680-31-9
  • InChI
    C6H18N3OP/c1-7(2)11(10,8(3)4)9(5)6/h1-6H3
  • InChI Key
    GNOIPBMMFNIUFM-UHFFFAOYSA-N
  • IUPAC Name
    n-[bis(dimethylamino)phosphoryl]-n-methyl-methanamine
  • Molecular Weight (kg)
    179.2
  • Phase
    l
  • PubChem ID
    1.2679e+4
  • SMILES
    CN(C)P(=O)(N(C)C)N(C)C
  • Synonyms

Physical Properties

  • Acentric factor
    0.801444
  • Critical pressure (bar)
    24.8864
  • Critical temperature (°C)
    403.068
  • Critical volume (m³/kmol)
    0
  • Dipole moment
  • Melting temperature (°C)
    7.2
  • Normal boiling temperature (°C)
    235

State-dependent Properties

  • API gravity
    -23.5214
  • Compressibility factor
    0.00564588
  • Density (kg/m³)
    1297.34
  • Dynamic viscosity (cP)
    3.36767
  • Enthalpy of vaporization (mass) (kJ)
    425.297
  • Enthalpy of vaporization (molar) (kJ/kmol)
    7.6213e+4
  • Gibbs free energy (kJ/kmol)
    0
  • Joule–Thomson coefficient
    -3.0510e-7
  • Kinematic viscosity
    2.5958e-6
  • Molar enthalpy (kJ/kmol)
    0
  • Molar entropy (kJ/(kmol·K))
    0
  • Molar heat capacity (kJ/(kmol·K))
    322.037
  • Molar volume (m³/kmol)
    0.138129
  • Parachor
    6.0798e-5
  • Poynting correction factor
    1.00566
  • Prandtl number
    46.4257
  • Saturation pressure (bar)
    1.4442e-5
  • Saturation temperature (°C)
    233.137
  • Solubility parameter
    2.3104e+4
  • Specific enthalpy (kJ)
    0
  • Specific entropy (kJ/kg·K)
    0
  • Specific gravity
    1.29862
  • Specific heat capacity (kJ/kg·K)
    1.79708
  • Surface tension
    0.0366921
  • Thermal conductivity
    0.130358
  • Thermal diffusivity
    5.5914e-8

Safety Properties

  • Autoignition temperature (°C)
    -273.15
  • Flash point temperature (°C)
    104.444
  • Lower flammability limit
    0.0113169
  • Upper flammability limit
    0.0720165

Environmental Properties

  • Global warming potential
  • Ozone depletion potential