Ammonium persulfate is a white, crystalline, odourlesssalt or crystalline powder with the density of 1.98g/cm3. It can be whollydecomposed under 120°C and reserve non-decomposable for a long period underentire desiccation. It is almost non – hygroscopic and will be graduallydecomposed to emit oxygen and ozone after hygroscopic effect. It will bedecomposed while being dissolved in the water and being heated. It is used aschemical reagent, oxidant, bleacher, deodorizer and initiator for thepolymerization of monomers. It has the particular advantage of having strongoxidizing and of being easy and safe to handle.