24589-77-3 4-Carboxyphenylhydrazine hydrochloride 4-Carboxyphenylhydrazinium chloride 4-Hydrazinobenzoic acid monohydrochloride 619-67-0 Benzoic acid, 4-hydrazino-, monohydrochloride Benzoic acid, p-hydrazino-, monohydrochloride CCRIS 7999 EINECS 246-330-0 NSC 153171 p-Carboxyphenylhydrazine hydrochloride p-Hydrazinobenzoic acid hydrochloride