Also Called: 2,2’,3,3’,5,6-hexachlorobiphenyl;2,2',3,3',5,6-Hexachlorobiphenyl;Polychlorinated biphenyls (PCBs);1,1'-Biphenyl, 2,2',3,3',5,6'-hexachloro-;2,2',3,3',5,6'-PCB;1,2,4-trichloro-3-(2,3,5-trichlorophenyl)benzene;2,2',3,3',5,6'-Hexachlorobiphenyl