Synthesis of A New Chromogenic Reagent Dibromo-p-Chloro-Sulfosulfonazo and Its Chromogenic Reaction with Ce(III)

The new chromogenic reagent,dibromo-p-chloro-sulfosulfonazo,was synthesized,which shows a good color reaction with cerium rare earth metal,and higher selectivity.The method can be applied to the photometric analysis of cerium in rare earth ore.