9.7.5 Storage

H2O2 decomposes slowly on exposure to light.

2 H2O2 (l) → 2 H2O (l) +  O2 (g)


In the presence of metal surfaces or traces of alkali (present in glass containers), the above reaction is catalysed. It is, therefore, stored in wax-lined glass or plastic vessels in dark.

Urea can be added as a stabiliser. It is kept away from dust because dust can induce explosive decomposition of the compound.

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