Molar mass
67.82 g/mol (anhydrous) 103.837 g/mol (dihydrate)
Appearance
colorless gas (anhydrous) colorless liquid (dihydrate)
Density
0.00276 g/cm3(anhydrous gas) 1.64 g/cm3(dihydrate)
Melting point
-126.8 °C, 146.4 K
Boiling point
-100.3 °C, 172.9 K
Cylinder Standard
ISO/GB/DOT
Cylinder Type
40L 50L Seamless Steel Cylinder