Synonym(s): Bathocuproin sulfonate, 2,9-Dimethyl-4,7-diphenyl-1,10-phenanthroline disulfonic acid disodium salt Formula: C26H18N2Na2O6S2 xH2O Formula weight: 564.55(anhy) Purity: 97% CAS Number: 52698-84-7 Harmonized Tariff Code:  2933.99