Hydrogen peroxide is a reactive substance in the presence of other substances, elements, radiation,
materials or cells. Both biotic and abiotic degradation processes are important routes in removal of
hydrogen peroxide in the environment:
2 H2O2 → 2 H2O + O2
Abiotic degradation of hydrogen peroxide is due to either reaction with itself (disproportionation),
or reaction with transition metals, organic compounds capable of reacting with hydrogen peroxide,
reaction with free radicals, heat or light (European Commission, 2003b). Hydrogen peroxide is
normally a short-lived substance in the environment but half-lives vary greatly depending on the
circumstances.