l-leucine 61-90-5

L-leucine, also known as leucine, is chemically known as alpha amino-isohexanoic acid and was first isolated from cheese in 1819 by Proust. Later, Braconnot crystallized from acid hydrolysates of muscle and wool and was named leucine. L leucine is one of the common 18 kinds of amino acids, and also is one of eight kinds of essential amino acids the human body, the other by a L isoleucine, leucine and L L - USES the molecular structure of amino acid contained in a methyl side chain known as Branched chain amino acids (Branched chain amina acids, BCAA).

The molecular formula of l-leucine is C6H1302N, the relative molecular weight is 131.18, and the molecular structure is:

L leucine has a white crystal or crystalline powder, is a kind of nonpolar amino acid, taste bitter, soluble in water, 20 ℃, 25 ℃ when the solubility of 23 respectively. 7 g/L and 24. 26 g/L, acetic acid (10.9 g/L) and carbonate solution, dilute hydrochloric acid and alkali solution, slightly soluble in alcohol (0. 72 g/L), insoluble in ether, heated to 145 ^ r 148 ℃ sublimation, 293-295 - c when the decomposition, the proportion of 1. 29 (180 c), than the polarimetric [a] D20 to + 14. 5 ^ - + 16. 0 (6 mo1 / L Hcl, C=1), isoelectric point 5.98.

It is an essential amino acid, and requires 2.2g/d in adult males, which is necessary for normal growth of infants and maintenance of normal nitrogen balance in adults. The product is used as nutrition supplement, amino acid infusion preparation and comprehensive amino acid preparation, hypoglycemic agent, plant growth promoter. According to GB 2760-86 regulation, this article can be used as spice.

2. As amino acid infusion and comprehensive amino acid preparation. For the diagnosis and treatment of infantile idiopathic hyperglycemia. It is also suitable for liver disease, anemia, poisoning, muscular atrophy, poliomyelitis, neuritis and psychopathology with maladjustment of glucose metabolism and decrease of bile secretion.