Synonyms: 2,9-Dimethyl-4,7-diphenyl-1,10-phenanthrolinedisulfonic acid, disodium salt; Bathocuproin sulfonate hydrate; Bathocuproinedisulphonic acid disodium salt; Bathocuproin sulphonate~2,9-Dimethyl-4,7-diphenyl-1,10-phenanthroline disulphonic acid disodium salt; BATHOCUPROINE SULFONATE SODIC; Bathocuproindisulfonic acid disodium salt