Hydrogen peroxide, chemical formula H2O2. Pure hydrogen peroxide is a light blue viscous liquid, which can be mixed with water in any proportion. It is a strong oxidant. The aqueous solution, commonly known as hydrogen peroxide, is a colorless and transparent liquid. Its aqueous solution is suitable for disinfection of medical wound, environment and food. In general, it will slowly decompose into water and oxygen, but the decomposition speed is extremely slow. The way to speed up the reaction speed is to add catalyst - manganese dioxide, etc. or irradiate with short wave ray。