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acesulfames

Acesulfame potassium is an artificial sweetener also known as Ace-K. The use of artificial sweeteners has been controversial, given some of their potential health risks. A class of artificial sweeteners derived from oxathiazinone, some varieties are over a hundred times sweeter than table sugar (sucrose). Acesulfame potassium is a highly versatile artificial sweetener that manufacturers use in a wide range of foods and drinks.

Acesulfame was one of a series of sweet-tasting substances synthesized by Hoechst AG in the late 1960s. All of these had in common the oxathiazinone dioxide ring structure. The synthesis involved the reaction of fluorosulfonyl isocyanate with either acetylene derivatives or active methylene compounds such as α-diketones, α-keto acids, or esters. The latter reaction is used for the commercial production of acesulfame K.

Acesulfame K is a white crystalline material that is stable up to 250 °C, at which temperature it decomposes. The free acid form of the sweetener has a distinct melting point of 123.5 °C.

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