Catsyn offer gram to tons of Disodium 4,4'-(2,9-dimethyl-1,10-phenanthroline-4,7-diyl)bis(benzenesulphonate) | CAS 40386-51-4, its formula is C26H18N2Na2O6S2, molecular weight is 564.54g/mol and the purity is usually NLT 98%.