Also Called: 4'-OH-PCB-93; 4-hydroxy-2 , 2' , 3' , 5' , 6'-pentachlorobiphenyl; 2 , 2' , 3' , 5' , 6'-pentachloro-4-biphenylol; 3-chloro-4- ( 2 , 3 , 5 , 6-tetrachlorophenyl) phenol;4'-hydroxy-2 , 2' , 3 , 5 , 6-pentachlorobiphenyl;4'-hydroxy-2,2',3,5,6-pentachlorobiphenyl