1,10-Phenanthroline, 2,9-dimethyl-4,7-diphenyl-, disulfo deriv, disodium salt 2,9-Dimethyl-4,7-diphenyl-1,10-phenanthroline, disulpho derivative, disodium salt 52698-84-7 73348-75-1 Bathocuproine disulfonic acid, disodium salt Bathocuproinedisulfonic acid disodium salt EINECS 258-111-7 NSC 123541