(1,1'-Biphenyl)-4,4'-diamine, 2,2',5,5'-tetrachloro- 15721-02-5 2,2',5,5'-TETRACHLOROBENZIDINE 2,2',5,5'-Tetrachloro(1,1'-biphenyl)-4,4'-diamine 2,2',5,5'-Tetrachloro-(1,1'-biphenyl)-4,4'-diamine 2,2',5,5'-Tetrachloro-4,4'-diaminodiphenyl 3,3',6,6'-Tetrachlorobenzidine 3-13-00-00447 (Beilstein Handbook Reference) BRN 3364286 Benzidine, 2,2',5,5'-tetrachloro- EINECS 239-815-3 Tetrachlorobenzidine