Phosphine

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

Explosive Limits / Potential

Moderately explosive when exposed to flame.
Lowest explosion limit in air 1.79 vol % or 26 g/cu m.
Liquefied phosphine (a mildly endothermic cmpd, standard heat of formation +22.8 kJ/mol, 0.67 kJ/g) can be detonated by powerful initiation.
... May ignite spontaneously in air or accumulate and explode in air without source of ignition. ... Closed containers may rupture violently when heated.
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