158076-62-1 2,2',3,3',4',5-Hexachloro-4-biphenylol 4-Hydroxy-2,2',3,3',4',5-hexachlorobiphenyl [1,1'-Biphenyl]-4-ol, 2,2',3,3',4',5-hexachloro- (9CI) [1,1'-biphenyl]-4-ol, 2,2',3,3',4',5-hexachloro-