L-tyrosine, molecular formula C9H11NO3, molecular weight 181.19, appearance is white powder, odorless, slightly bitter, soluble in dilute acid, mat, insoluble in anhydrous ethanol, ether, acetone,L-tyrosine can be used in medicine, food, daily chemical, biochemical research and other fields.
There are many ways to obtain L-tyrosine. For example, casein can be used as a raw material, reflux in hydrochloric acid for several hours, then filtration, concentration, alkali neutralization, activated carbon treatment, and crystallization can produce L-tyrosine. In addition, silk, casein and other proteins can also be used as raw materials, after acid hydrolysis of the product for neutralization reaction, and then through precipitation separation, the use of dilute ammonia to dissolve, and then with acetic acid neutralization, so that the pH value reached 5, and then through recrystallization to get L-tyrosine. L-tyrosine can also be separated and purified by proteolytic extraction method using pig blood powder, horn hoof, silk and other raw materials after acidification.