4-sulfophenylhydrazine, 4-Hydrazinobenzolsulfonsure, Phenylhydrazine-p-sulfonicaci, p-Hydrazinophenylsulfonic, p-hydrazinobenzenesulfonic acid, Benzenesulfonic acid, 4-hydrazino-, p-hydrazinophenylsulfonicacid, 4-Sulphophenylhydrazine, 4-hydrazino-benzene sulfonic acid, 4-hydrazinobenzene sulphonic acid, Phenylhydrazine-4-acid, p-sulfophenylhydrazine