Chemwill Asia co.,Ltd is one of the leading manufacturer  in CHINA. 

Our main production base is located in Xuzhou industry park. We produce a wide range of organics including Active pharmaceutical ingredients(APIs), Veterinary,  Indole derivatives, Aromatics, Fluorine, Boronic acids, organocatalysts, chiral building blocks, heterocyclic compounds. We are certified both to the ISO 9001 and ISO 14001 Standards, have a safety management system in place. 

Our R&D team masters core technology for process-design of target building block as well as Tailor-made fine chemicals. Our manufactory specialised in extreme temperature conditions (-100ºC to +300ºC), hydrogenations reaction under high pressure, suzuki coupling reaction, photochemical reaction, Mitsunobu reactions, enantioselective reactions and asymmetric synthesis. 

1.Client is first.

2.Credibility is the most important.

3.Quality control is our life.

4.Great sense of responsibility.

5.We will be responsible for not only our products, our clients, also the society.

The corporation's destination: we will constantly strive to supply customers with new and high-tech products and will keep the leadership in the field. 

L-valine is white monoclinic crystal or crystalline powder, and it is colorless plate or scaly crystal when it is re-cleaned with ethanol aqueous solution. Odorless, with a special bitter taste. Melting point is about 315℃. The PH Chemicalbook of 5% aqueous solution is 5.5~7.0. Stable to heat, light and air. Soluble in water (8.85g/ 100mL, 25℃), almost insoluble in ethanol and ether. It is difficult to separate from leucine. It is an essential amino acid.

L-valine is one of the branched chain amino acids (BCAA), which cannot be synthesized by animals themselves and must be taken from diets to meet their nutritional needs. Therefore, l-valine is an essential amino acid. Amino acid is the basic structural unit of protein synthesis, the precursor of other amines required for metabolism, and is an indispensable substance for life. At present, there are 20 to 30 kinds of amino acids known, some of which can be synthesized in the human body, called non-essential amino acids, and some of which cannot be synthesized in the human body and must be supplemented from the outside, called essential amino acids, mammalian cells need 12 kinds of essential amino acids: L-arginine, L-cystine, L-histidine, L-leucine, L-isoleucine, L-lysine, L-methionine, L-phenylalanine Chemicalbook, L-threonine, L-trp, L-tyrosine, L-valine. These amino acids are left-handed isomers, and some of the non-essential amino acids may have inhibitory effects on cultured cells. The absorption of L-amino acids was easier than that of D-amino acids, but the absorption of D and L-methionine had no difference. There is competition for the delivery of amino acids, and the delivery of one amino acid can be inhibited by the presence of another. Such as L-valine and L-methionine can inhibit the absorption of L-leucine. Excessive lysine in feed inhibits absorption of arginine. L-methionine absorption was unaffected by a high concentration (100mM) of l-valine because it could be carried out through another transport route.