Phosphorus trichloride can be used in the production of organophosphorus insecticides (such as dipterex, dichlorvos, methamidophos,orthene), commonly used as the raw materials of inorganic / organic compounds (such as phosphorus oxychloride , phosphorous acid, triphenyl phosphite), water treatment agent, organophosphorus pesticides (such as herbicides, glyphosate, etc.). In the pharmaceutical industry, it can be used as intermediates of sulfadiazine (S.D), sulfotaxazine (S.M.D) and other drugs. In the dye industry field, it can Used as a comprehensive agent, catalyst, chlorination agent and solvents.