Acesulfame-K, also known as acesulfame potassium or Ace-K, is an artificial sweetener used to sweeten foods and beverages without adding calories. It is approximately 200 times sweeter than sucrose (table sugar). Chemically, Acesulfame-K is a potassium salt of the organic compound acesulfame. It is a white crystalline powder that is easily soluble in water, stable under heat, and suitable for use in cooking and baking.