trichlorobenzene 2,3,4-trichlorobiphenyl IUYHQGMDSZOPDZ-UHFFFAOYSA-N PCB 21 CAS:55702-46-0 Clc1ccc(-c2ccccc2)c(Cl)c1Cl 0 CHEBI:34222 KEGG:C14357 InChI=1S/C12H7Cl3/c13-10-7-6-9(11(14)12(10)15)8-4-2-1-3-5-8/h1-7H A trichlorobiphenyl that is biphenyl in which the hydrogens at positions 2, 3, and 4 on one of the benzene rings are replaced by chlorines. chebi_ontology 2,3,4-trichloro-1,1'-biphenyl 1,1'-Biphenyl, 2,3,4-trichloro- C12H7Cl3 2,3,4-Trichlorobiphenyl 255.96133 257.54208 trichlorobiphenyl