1,1'-Biphenyl, 2,2',3,3',4-pentachloro- 2,2',3,3',4'-Pentachlorobiphenyl 2,2',3,3',4-Pentachloro-1,1'-biphenyl 2,2',3,4,5-PENTACHLOROBIPHENYL 2,3,4,2',3'-Pentachlorobiphenyl 52663-62-4 PCB 82