1,1'-Biphenyl, 2,2',3,4,5'-pentachloro- 2,2',3,4,5'-PENTACHLOROBIPHENYL 2,2',3,4,5'-Pentachlorodiphenyl 2,3,4,2',5'-Pentachlorobiphenyl 2,5,2',3',4'-Pentachlorobiphenyl 38380-02-8 BRN 2507417 PCB 87