L-cysteine is an amino acid with physiological functions. It is the only amino acid with a reducing sulfhydryl group (-SH) among more than 20 amino acids that make up proteins. It is widely used in medicine, food additives and cosmetics. In 2002, global demand for cysteine reached 4400-4600 tonnes and the annual growth rate was 2-3%.

L-cysteine is a common amino acid in living organisms. It belongs to the sulfur-containing amino acids. In the presence of nitroprusside, it becomes purple (colored by SH). It is found in many proteins and glutathione. It can form insoluble with Ag+, Hg+, Cu+ and other metal ions. Mercaptide. What i

fumaric acid is an important organic basic chemical raw material and fine chemical product. Food-grade fumaric acid is mainly used as an acidity regulator, and can also be used as an anti-thermal oxidation aid, a pickling accelerator, an antifungal agent, a preservative, and a spice. What is the agr

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.