2006-10-23T12:00:00.002be5010c-0e11-4ad0-93d9-4044a52c5a2f2006-10-23T12:00:00.00false1,1'-biphenyl, 2,3',4,4'-tetrachloro- (9CI)2,3',4,4'-tetrachloro-1,1'-biphenyl2,3',4,4'-tetrachlorobiphenyl2,4,3',4'-tetrachlorobiphenyl3,4,2',4'-tetrachlorobiphenylbiphenyl, 2,3',4,4'-tetrachloro- (8CI)PCB 662,3',4,4'-tetrachlorobiphenyl (CB66)