Acesulfame K is a synthetic substance and the potassium salt of a sulfonate compound. It is approximately 200 times sweeter than sucrose, but can give a bitter aftertaste, especially when used at high concentration. Acesulfame K is often used in combination with sucralose or aspartame to provide a more sucrose-like taste in soft drinks, shakes, and smoothies. This combination is also used to make pharmaceuticals more palatable. Acesulfame is moderately heat stable.
Acesulfame K is a white, nonhygroscopic, crystalline powder with a high solubility in water (220 g/L at 25°C). There is also quite some solubility in sugar syrups, polyol syrups, and in ethanol/water mixtures. It melts at temperatures over 200°C (decomposition) and has excellent pH and heat stability in food processing. The application range therefore is from drinks and dairy products to confectionery and bakery products.