Parameter Value

Boiling point

−160˚C to −162˚C

Molecular weight

16 ? 19 g/mol

Density

425 - 485 kg/m³

Specific heat capacity

2.2 - 3.7 kJ/kg/˚C

Viscosity

0.11 - 0.18 mPa・s

Higher heat value

38 - 44 MJ/m³