Hydrogen Peroxide (H2O2) is a liquid; hydrogen peroxide has no discernible colour or scent. Hydrogen peroxide is usually found in a water solution instead of its pure form due to its instability and potential for explosion. Deodorants, water and sewage treatment, rocket fuels, disinfection, and the production of other chemicals all make use of this versatile oxidising and bleaching agent. Hydrogen peroxide mainly causes local irritation at the point of contact. H202 is an irritant that can be inhaled and irritate the respiratory tract. Extreme cases may result in life-threatening bronchitis or pulmonary oedema.
French chemist Louis Jacques Thénard is believed to have found hydrogen peroxide when he attempted to separate H2O2 from water but failed because there were trace impurities that made it decompose. Pure H2O2 was only found through vacuum distillation in 1894.
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