Aspartame, whose scientific name is aspartyl phenylalanine methyl ester and chemical formula is C14H18N2O5, exists as a white powder at room temperature and is a natural functional oligosaccharide with high sweetness, no deliquescence and no caries. It can be eaten by diabetes patients. Aspartame can be added to beverages, pharmaceutical products or sugar free chewing gum as a sugar substitute because of its extremely low calorie and high sweetness. The calorie of aspartame is about 16.75kJ/g [6], and 2.8mg/dl aspartame can make people feel sweet, so a small amount of aspartame can be ignored Heat generated.

     Stability

     Under certain temperature and acidic pH conditions, the ester bonds of aspartame aqueous solution can be hydrolyzed to form aspartate phenylalanine and methanol. Under neutral, alkaline (pH>7) or heated conditions, or by cyclization to eliminate methanol, aspartate phenylalanine is formed. Finally, aspartate phenylalanine will continue to hydrolyze to form two separate amino acids - aspartate and phenylalanine.

      Sweetness

   Aspartame has a refreshing, sugar like sweetness, and it does not have the bitter or metallic aftertaste typically found in artificial sweeteners, which is an important advantage of it.