Molecular Weight

    Molecular weight  : 44.01 g/mol

Solid phase

    Latent heat of fusion (1,013 bar, at triple point) : 196.104 kJ/kg
    Solid density  : 1562 kg/m3

Liquid phase

    Liquid density (at -20 °C (or -4 °F) and 19.7 bar) : 1032 kg/m3
    Liquid/gas equivalent (1.013 bar and 15 °C (per kg of solid)) : 845 vol/vol
    Boiling point (Sublimation) : -78.5 °C
    Latent heat of vaporization (1.013 bar at boiling point) : 571.08 kJ/kg
    Vapor pressure (at 20 °C or 68 °F) : 58.5 bar

Critical point

    Critical temperature  : 31 °C
    Critical pressure  : 73.825 bar
    Critical density  : 464 kg/m3

Triple point

    Triple point temperature  : -56.6 °C
    Triple point pressure  : 5.185 bar

Gaseous phase

    Gas density (1.013 bar at sublimation point) : 2.814 kg/m3
    Gas density (1.013 bar and 15 °C (59 °F)) : 1.87 kg/m3
    Compressibility Factor (Z) (1.013 bar and 15 °C (59 °F)) : 0.9942
    Specific gravity (air = 1) (1.013 bar and 21 °C (70 °F)) : 1.521
    Specific volume (1.013 bar and 21 °C (70 °F)) : 0.547 m3/kg
    Heat capacity at constant pressure (Cp) (1.013 bar and 25 °C (77 °F)) : 0.037 kJ/(mol.K)
    Heat capacity at constant volume (Cv) (1.013 bar and 25 °C (77 °F)) : 0.028 kJ/(mol.K)
    Ratio of specific heats (Gamma:Cp/Cv) (1.013 bar and 25 °C (77 °F)) : 1.293759
    Viscosity (1.013 bar and 0 °C (32 °F)) : 0.0001372 Poise
    Thermal conductivity (1.013 bar and 0 °C (32 °F)) : 14.65 mW/(m.K)

Miscellaneous

    Solubility in water (1.013 bar and 0 °C (32 °F)) : 1.7163 vol/vol
    Concentration in air  : 0.03 vol %