Phenylhydrazine is used in pesticide production to synthesize 1-phenylaminourea, the intermediate of Triazophos and 1-phenyl-3,6-dihydroxypyridazine, the intermediate of pyridazinon. It is also the intermediate of oxazolidone and imidazolidone, a new fungicide. In addition, phenylhydrazine, as an organic synthetic raw material, is also used as an intermediate in dye, medicine and other industries, as well as an analytical reagent.