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Marsh Gas Structure

Marsh Gas

Chemical Properties

Melting point −183 °C(lit.)
Boiling point −161 °C(lit.)
Density  0.716 g/mL at 25 °C(lit.)
vapor density  0.55 (vs air)
refractive index  1.0004
Flash point -188 ºC
form  gas
pka 48(at 25℃)
Odor odorless
explosive limit 15%
Water Solubility  24.4mg/L(25 ºC)
Merck  13,5979
BRN  1718732
Dielectric constant 1.7(-173℃)
Stability Stable. Extremely flammable - note low flash point; mixtures with air constitute an explosion hazard. Reacts violently with interhalogens. Incompatible with strong oxidizing agents, halogens, interhalogens, oxygen.
CAS DataBase Reference 74-82-8(CAS DataBase Reference)
EPA Substance Registry System Methane (74-82-8)

Safety Information

Hazard Codes  F+
Risk Statements  12
Safety Statements  9-16-33
RIDADR  UN 1971 2.1
WGK Germany  -
RTECS  PA1490000
4.5-31
Autoignition Temperature 998 °F
DOT Classification 2.1 (Flammable gas)
HazardClass  2.1
Hazardous Substances Data 74-82-8(Hazardous Substances Data)

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