Density: 1.83kg/m3 (gas)
Melting point: -187.6℃
Boiling point: -42.1
Flash point: -104℃
Critical temperature: 96.8℃ [6]
Critical pressure: 4.25MPa [6]
Ignition temperature: 450℃ [6]
Upper explosion limit (V/V) : 9.5% [6]
Lower explosive limit (V/V) : 2.1% [6]
Appearance: Colorless gas
Solubility: slightly soluble in water, soluble in ethanol, ether