citric acid is the largest organic acid produced by biochemical methods in the world. citric acid and salts are one of the pillar products of the fermentation industry and are mainly used in the food industry, such as acidulants, solubilizers, buffers, antioxidants, Deodorant, flavor enhancer, gelling agent, toner, etc.

The chemical formula of aspartame is C14H18N2O5. It is available at room temperature as a white powder. It is a natural functional oligosaccharide with high sweetness, does not melt easily and is caries-free. It can be eaten by diabetics.

The chemical formula of fumaric acid is C4H4O4, a butene-derived carboxylic acid and a colorless, flammable crystal.

Aspartame can be added as a sugar substitute because of its extremely low calorie content and its high sweetness to beverages, pharmaceuticals or sugar-free chewing gum. The calorie content of aspartame is about 16.75 kJ/g, and 2.8 mg/dl aspartame can make people feel sweet, so the heat generated by a small amount of aspartame can be ignored.