Hydrogen peroxide

CAS RN: 7722-84-1

Fire Potential

A dangerous fire hazard by chemical reaction with flammable materials. Hydrogen peroxide is a powerful oxidizer, particularly in the concentrated state. It is important to keep containers covered because the contents of uncovered containers are much more prone to react with flammable vapors, gases, etc.; and, if uncovered, the water from a hydrogen peroxide solution can evaporate, concentrating the material and thus increasing the fire hazard.
... Solutions of hydrogen peroxide in concentration in excess of 65 wt% heat up spontaneously when decomposed to water + 1/2 oxygen. Thus, 90 wt% soln, when caused to decompose rapidly due to the introduction of a catalytic decomposition agent, can get quite hot and perhaps start fires.
Since the compound is such a strong oxidizer, when spilled on combustible materials it can set fire to them. Detonation can occur if the peroxide is mixed with incompatible (most) organic compounds.
Leakage from drums of 35% hydrogen peroxide onto a wooden pallet caused ignition of the latter when it was moved. Combustion, though limited in area, was fierce and took some time to extinguish. Leakage of 50% peroxide onto supporting pallets under polythene sheeting led to spontaneous ignition and a fierce fire. Contact of 50% peroxide with wood does not usually lead to spontaneous ignition, but hot weather, dry wood and the thermal insulation of the cover may have contributed to ignition.
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