Under atmospheric pressure for Colorless flammable gas. Melting point 159.4 ℃. Boiling point 11.73 ℃. Slightly soluble in water, soluble in ethanol, ethyl ether, etc. In mixture with air to form explosive, the explosion limit of 1.9% ~ 8.4% (volume). Mainly exist in the natural gas, refinery gas and pyrolysis gas, by the physical separation from, also by n-butane isomerization was. It is mainly used for isooctane and isobutylene via alkylation system, as a gasoline octane improver. Also can be used as a coolant.
Refrigerant R600a is a kind of excellent performance of the new type of hydrocarbon refrigerants, derived from natural ingredients, no damage to the ozone layer, without the greenhouse effect, green environmental protection. Its characteristic is the latent heat of evaporation is big, cooling ability is strong;
Low flow performance is good, delivery pressure, low power consumption, load temperature picks up speed. Compatible with all kinds of compressor oil.

Appearance & Properties: Colorless, slightly smell gas. 
Melting point(℃): -159.6
Relative density (water=1) : 0.56
Boiling point(℃): -11.8
Relative Vapor Density (air=1) : 2.01
Molecular formula: C4H10
Molecular weight: 58.12
Saturated vapor pressure (kPa): 160.09(0℃)
Heat of combustion (kJ/mol): 2856.6
Critical temperature(℃): 135
Critical pressure(MPa): 3.65
Flash point (℃): -82.8
Upper explosive limit%(V/V): 8.5
Ignition temperature(℃): 460
Lower explosive limit %(V/V): 1.8