(1,1'-Biphenyl)-4,4'-diamine, 3,3',5,5'-tetrachloro- (9CI) 3,3',5,5'-Tetrachloro-(1,1'-biphenyl)-4,4'-diamine 3,3',5,5'-Tetrachlorobenzidine 3-13-00-00448 (Beilstein Handbook Reference) 41687-08-5 BRN 3360567 Benzidine, 3,3',5,5'-tetrachloro- CCRIS 1274