Acesulfame-K was discovered in 1967 and is one of the most widely approved intense sweeteners globally, holding approvals from FDA (21 CFR 172.800), EFSA (E950), and JECFA with an ADI of 0–15 mg/kg body weight. Its oxathiazinone ring structure is stable across a broad pH range (3–8) and withstands temperatures up to 225 °C. This makes it suitable for baking and UHT processing.
Unlike many other high-intensity sweeteners, it is not metabolized in the body and is excreted unchanged in urine. It synergizes strongly with sucralose, aspartame, and steviol glycosides. This allows significant sugar reduction. In some preservative formulations it is included as a flavor-masking component.