Physicochemical properties
Appearance, smell and condition: colorless, odorless, deep cold liquid
Molecular weight: 39.95
Boiling point: (1 atmosphere)-302.2F (-185.9C)
Specific gravity: (air =1) 1.38
Freezing/melting point: (1 atmosphere)-308.90F(-189.40ºC)
Gas density: (70F(21.1C) at 1 atmosphere): 0.103lb/ft3 (1.65kg/m3)
Product use
Mainly used in semiconductor industry, rare metals, non-ferrous metals smelting, welding protection gas, special light bulb filling gas, gas chromatography analysis with carrier gas and preparation of standard gas base.