The characteristic is that when heated above a certain temperature, it will decompose to produce oxygen-containing free radicals, which is unstable and easy to decompose. Organic peroxides produced by chemical industry are mainly used as polymerization initiators and catalysts for synthetic resins. In the field of polymer materials, it can be used as an initiator for free radical polymerization, an initiator for grafting reaction, a cross-linking agent for rubber and plastics, a curing agent for unsaturated polyester, and the molecular weight and molecular weight in the preparation of spinning grade polypropylene. Molecular weight distribution modifier. Polluted air in the environment can produce peroxyacyl nitrate compounds through free radical reaction under the action of light, which is one of the species of photochemical oxidants. It is strongly irritating to the skin, eyes and mucous membranes, and is an important pollutant in the atmosphere. Such substances are inflammable and explosive dangerous goods, and attention should be paid to safety in use. Generally, four indicators, active oxygen content, activation energy, half-life and decomposition temperature, are used as the basic basis for selection.