4-Methylphenylhydrazine hydrochloride 637-60-5 Hydrazine, (4-methylphenyl)-, monohydrochloride Hydrazine, p-tolyl-, hydrochloride Hydrazine, p-tolyl-, monohydrochloride NSC2112 WLN: ZMR D1 &GH p-Tolylhydrazine hydrochloride