L-tyrosine is an amino acid and a non-essential amino acid in human body. L-tyrosine can be extracted from hydrolysate containing casein, corn and other protein substances. Its appearance is crystalline powder, bitter taste, soluble in acid and alkali solution, slightly soluble in water, insoluble in anhydrous ethanol, ether, acetone, etc., molecular formula C9H11NO3, molecular weight 181.19, CAS number 60-18-4.
L-tyrosine was mainly produced by protein hydrolysis in the early stage, but this method was gradually phased out due to limited raw material sources, complex process and long cycle, and was replaced by microbial fermentation, extraction and chemical production methods.
At present, L-tyrosine is mainly used in medical treatment, biochemical research and other fields. It can be used for determining the standard of nitrogen in amino acids, colorimetric quantitative analysis with Milon reaction, and preparation of tissue culture medium. In addition, L-tyrosine is widely used in the medical field as raw materials of various drugs and nutritional supplements.