(1,1'-Biphenyl)-4,4'-diamine, 3,3',5,5'-tetrafluoro- (9CI) 3,3',5,5'-Tetrafluoro-(1,1'-biphenyl)-4,4'-diamine 3,3',5,5'-Tetrafluorobenzidine 42794-87-6 BRN 2864699 Benzidine, 3,3',5,5'-tetrafluoro- CCRIS 1278