(1,1'-Biphenyl)-3,3',4,4'-tetramine, tetrahydrochloride 125937-03-3 3,3',4,4'-Biphenyltetramine, tetrahydrochloride 3,3',4,4'-Tetraaminobiphenyl tetrahydrochloride 3,3'-DIAMINOBENZIDINE TETRAHYDROCHLORIDE 3,3'-Diaminobenzidine hydrochloride 3,3'-Diaminobenzidine, tetrahydrochloride 3,3'-Diaminobenzidine-4HCl 3,3'-Diammoniumbenzidinium tetrachloride 7411-49-6 Biphenyl-3,3',4,4'-tetrayltetraammonium tetrachloride EINECS 231-018-9 HSDB 5079 NSC 75650