The chemical formula of ammonium persulfate (NH4)2S2O8, CAS number 7727-54-0, is usually white crystalline powder or granules, odorless and easy to absorb moisture. It is easily soluble in water, the aqueous solution is acidic, and it is insoluble in organic solvents such as ethanol and ether. It is chemically active and has strong oxidizing properties. It can oxidize metal ions and organic matter. It is easily decomposed when heated (over 120°C) or in contact with reducing agents and organic matter. It releases oxygen and produces ammonium sulfate, sulfuric acid and other substances, which is irritating to the skin and mucous membranes. In industry, it is mainly used in the chemical industry (as an initiator for polymerization reactions), metal surface treatment (as an etching agent, oxidation treatment agent); it is also used in the textile industry (as a bleaching agent, dye oxidation color forming agent), papermaking industry (for bleaching and deinking of paper), and can also be used as an oxidant for the synthesis of pharmaceutical intermediates and water quality treatment (to remove reducing pollutants in water).