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Properties of cyclooctasiloxane, hexadecamethyl-

Thermophysical properties for cyclooctasiloxane, hexadecamethyl- (CAS: 556-68-3). 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: 16, H: 48, O: 8, Si: 8
  • CAS
    556-68-3
  • Formula
    C16H48O8Si8
  • ID
    556-68-3
  • InChI
    C16H48O8Si8/c1-25(2)17-26(3,4)19-28(7,8)21-30(11,12)23-32(15,16)24-31(13,14)22-29(9,10)20-27(5,6)18-25/h1-16H3
  • InChI Key
    XKJMJYZFAWYREL-UHFFFAOYSA-N
  • IUPAC Name
    2,2,4,4,6,6,8,8,10,10,12,12,14,14,16,16-hexadecamethyl-1,3,5,7,9,11,13,15-octaoxa-2,4,6,8,10,12,14,16-octasilacyclohexadecane
  • Molecular Weight (kg)
    593.232
  • Phase
    s
  • PubChem ID
    1.1170e+4
  • SMILES
    C[Si]1(O[Si](O[Si](O[Si](O[Si](O[Si](O[Si](O[Si](O1)(C)C)(C)C)(C)C)(C)C)(C)C)(C)C)(C)C)C
  • Synonyms

Physical Properties

  • Acentric factor
    0.59762
  • Critical pressure (bar)
    6.92
  • Critical temperature (°C)
    416.05
  • Critical volume (m³/kmol)
    1.98
  • Dipole moment
  • Melting temperature (°C)
    31.5
  • Normal boiling temperature (°C)
    290

State-dependent Properties

  • API gravity
    18.4578
  • Compressibility factor
    0.0231282
  • Density (kg/m³)
    1048.41
  • Dynamic viscosity (cP)
    0
  • Enthalpy of vaporization (mass) (kJ)
    111.125
  • Enthalpy of vaporization (molar) (kJ/kmol)
    6.5923e+4
  • Gibbs free energy (kJ/kmol)
    0
  • Joule–Thomson coefficient
  • Kinematic viscosity
  • Molar enthalpy (kJ/kmol)
    0
  • Molar entropy (kJ/(kmol·K))
    0
  • Molar heat capacity (kJ/(kmol·K))
    703.719
  • Molar volume (m³/kmol)
    0.565841
  • Parachor
    2.2507e-4
  • Poynting correction factor
    1.02621
  • Prandtl number
  • Saturation pressure (bar)
    4.3061e-6
  • Saturation temperature (°C)
    290.009
  • Solubility parameter
    1.0012e+4
  • Specific enthalpy (kJ)
    0
  • Specific entropy (kJ/kg·K)
    0
  • Specific gravity
    1.04944
  • Specific heat capacity (kJ/kg·K)
    1.18625
  • Surface tension
    0.0143985
  • Thermal conductivity
  • Thermal diffusivity

Safety Properties

  • Autoignition temperature (°C)
    -273.15
  • Flash point temperature (°C)
    131.85
  • Lower flammability limit
    0.00477265
  • Upper flammability limit
    0.0303714

Environmental Properties

  • Global warming potential
  • Ozone depletion potential