E2658-CH4
Rev 12.03.2021
Methane
Colorless flammable gas, widely used as a fuel.
Synonyms: Marsh Gas, Natural Gas, Carbon tetrahydride, Hydrogen carbide
Conversion of ppm to mg/m
3
is calculated for 25°C and 1 atm.
3
Chemical formula
CH
4
Molar weight
16
Relative gas density (to air)
0.55
Conversion
1 ppm = 0.65 mg/m
3
Boiling point
−161.49 °C
Low explosive limit (LEL), % vol. in air
5.0
Upper explosive limit (UEL), % vol. in air
15
Odor
Odorless when pure. Methane used in the kitchens
contains an odorant
Hazards
Highly flammable, mixtures with air are explosive.
Asphyxiant.
Exposure limits
not established
