1,2,3,5-tetrachloro-4-(2,3,5,6-tetrachlorophenyl)benzene;40186-71-8;PCB 201;2,2',3,3',4,5',6,6'-Octachlorobiphenyl;1,1'-Biphenyl, 2,2',3,3',4,5',6,6'-octachloro-;2,2',3,3',4,5',6,6',-OCTACHLOROBIPHENYL;2,2',3,3',4,5',6,6'-Octachloro-1,1'-biphenyl
1,2,3,5-tetrachloro-4-(2,3,5,6-tetrachlorophenyl)benzene