L-tyrosine is a kind of non-essential amino acid that can be used in medicine, food, daily chemical, biochemical research and other fields. It is a white powder with slightly bitter taste, no odor, and L-tyrosine can be dissolved in acid and alkali solutions, but insoluble in anhydrous ethanol, acetone and ether. Its molecular formula C9H11NO3, molecular weight 181.19, CAS number 60-18-4, EINECS number 200-460-4.
L-tyrosine inhibits the activity of citrate synthase in the posterior cortex, so it can be used in pharmaceutical production and chemical industry as a raw material. Think of L – tyrosine, there are several kinds of methods, for example, using casein as raw materials, in hydrochloric acid reflux hours after the filtration, concentration, alkali neutralization and activated carbon treatment, crystallization get L – tyrosine, also can be spun silk, casein protein as raw materials, such as acid hydrolysis product of neutralization reaction, then through precipitation separation, dissolved in dilute aqua ammonia, It was then neutralized with acetic acid to a pH of 5 and recrystallized to obtain L-tyrosine. L-tyrosine can also be obtained from pig blood powder, cow’s horn hoof and silk after acidification by separation and purification.