(+-)-PCB 136 1,1'-Biphenyl, 2,2',3,3',6,6'-hexachloro- 153084-05-0 2,2', 3,3',6,6'-Hexachlorobiphenyl 2,2',3,3',6,6'-HEXACHLOROBIPHENYL 2,2',3,3',6,6'-Hexachloro-1,1'-biphenyl 2,3,6,2',3',6'-Hexachlorobiphenyl 38411-22-2 BRN 2294224 PCB 136