1,1'-Biphenyl, 2,3',4'-trichloro- 2',3,4-TRICHLOROBIPHENYL 2,3',4'-Trichlorobiphenyl 3,4,2'-Trichlorobiphenyl 3-05-00-01740 (Beilstein Handbook Reference) 38444-86-9 BRN 2100091 Biphenyl, 2',3,4-trichloro- PCB 33