Acesulfame potassium impurity B

Acesulfame potassium impurity B is a degradation byproduct arising from the hydrolytic cleavage of the sulfonamide moiety in the parent acesulfame structure. It retains the 6-methyl-1,2,3-oxathiazole core but features a sulfinic acid functional group in place of the terminal amide, resulting in reduced thermal stability. This impurity forms under acidic conditions during synthesis or storage, reflecting a partial oxidation pathway. It serves as a critical HPLC reference standard for quantifying degradation in acesulfame formulations.