Synonyms: 1,1'-Biimidazole,2,2'-bis(o-chlorophenyl)-4,4',5,5'-tetraphenyl- (7CI,8CI);2,2-Bis(2-chlorophenyl)-4,4',5,5'-tetraphenyl-1,1'-biimidazole;2,2'-Bis(2-chlorophenyl)-4,4',5,5'-tetraphenyl-1,1'-bi-1H-imidazole;2,2'-Bis(2-chlorophenyl)-4,4',5,5'-tetraphenylbiimidazole;2,2'-Bis(2-chlorophenyl)-4,4',5,5'-tetraphenylbisimidazole;2,2'-Bis(2-chlorophenyl)-4,5,4',5'-tetraphenyl-1,1'-biimidazole;2,2'-Bis(o-chlorophenyl)-4,4',5,5'-tetraphenyl-1,1'-biimidazole;2,2'-Bis(o-chlorophenyl)-4,4',5,5'-tetraphenylbiimidazole;2,2'-Bis(o-chlorophenyl)-4,5,4',5'-tetraphenyl-1,1'-biimidazole;2-(2-Chlorophenyl)-4,5-diphenylimidazolyl dimer;B-CIM;CBim;