Color: colorless
State at 25°C: gas
Density (g/cm3): 0.0001
Hardness (Mohs): No data 
Melting Point (K): 14.06
Boiling Point (K): 20.4
Heat of Fusion (kJ/mol): 0.117
Heat of Vaporization (kJ/mol): 0.9
Heat of Atomization (kJ/mol): 218
Therm. Conductivity (J/m sec K): 0.18
Elec. Conductivity (1/mohm cm): No data
Abundance, Solar System: 10.446
Abundance, Earth's Crust: 3.1
Pure Cost ($/100g): $ 12.00
Bulk Cost ($/100g):  
Source: Water, methane