CAS RN: 7803-51-2
UN/NA: 2199

Fire Potential

Very dangerous fire hazard by spontaneous chemical reaction.
Moderately explosive when exposed to flame.
Pure phosphine does not spontaneously ignite in air below 150 deg C unless it is thoroughly dried, when it ignites in cold air. The presence of traces (0.2%) of diphosphane in phosphine as normally prepared causes it to ignite spontaneously in air, even at below -15 deg C ... Traces of oxidants promote pyrophoricity.
Spontaneously flammable in air if there is trace of /diphosphane/ present; burns with luminous flame.
Flammable gas. Pyrophoric; may ignite spontaneously in air or accumulate and explode in air without source of ignition.
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