Synonyms: disodium 4,4'-(2,9-dimethyl-1,10-phenanthroline-4,7-diyl)dibenzenesulfonate;Disodium 4,4'-(2,9-dimethyl-1,10-phenanthroline-4,7-diyl)bis(benzenesulphonate);40386-51-4;disodium 4-[2,9-dimethyl-7-(4-sulfonatophenyl)-1,10-phenanthrolin-4-yl]benzenesulfonate;AC1Q1UVR;AC1L55CL;AC1N279S;EINECS 254-899-1;AR-1I6468;2,9-Dimethyl-4,7-di(4-sulfophenyl)-1,10-phenanthroline, disodium salt;AG-F-43186;1,10-Phenanthroline, 2,9-dimethyl-4,7-di(phenylsulfonic acid)-, disodium salt;Benzenesulfonic acid, 4,4'-(2,9-dimethyl-1,10-phenanthroline-4,7-diyl)bis-, disodium salt;Benzenesulfonic acid, 4,4'-(2,9-dimethyl-1,10-phenanthroline-4,7-diyl)bis-, sodium salt (1:2)