1,1'-Biphenyl, 4,4'-dichloro- 2050-68-2 4,4'-DICHLORO-1,1'-BIPHENYL 4,4'-Dichlorobiphenyl AI3-09066 Biphenyl, 4,4'-dichloro- Biphenyl, 4,4'-dichloro- (8CI) EINECS 218-095-4 NSC 1141 PCB 15 Polychlorobiphenyl p,p'-Dichlorobiphenyl p,p-Dcbp