L-Valine

Amino Acid L-Valine
Standard :AJI92 USP24
Appearance: White crystals
Additive of food for human being and animals
L-Valine is aliphatic amino acids ,one of twenty protein amino acids and one of eight essential amino acids for human body.

The scientific name of L-Valine is L-2-Amino-3-methylbutyric acid. This amino acid is white crystals or crystalline powder; No smell, slightly sweet taste then bitter. Melting point is about 315 degrees. 5% aqueous solution of the PH value is 5.5-6.5. Heat, light and air stability. Soluble in water (8.85g/100ml, 25 degrees), almost insoluble in alcohol and ether. Specific rotation[a]
D
20
: +26.5°∼+29.0°.
L-Valine is aliphatic amino acids ,one of twenty protein amino acids and one of eight essential for human body. It also belongs to one of the three branched-chain amino acids. Involved in connective tissue, epithelial mesenchymal capillary formation, and maintain normal permeability, can increase appetite and promote secretion of pepsin, enhance immunity, improve the growth retardation, to prevent tooth decay and promote the growth of children and improve calcium absorption, promote bone growth, the lack of the human body when the body would affect the growth and development, caused by a nerve-impaired, movement disorders, anemia, and so on. Used as the main nutritional supplements, and the main ingredients of amino acid infusion and integrated amino acid preparation.

L-Valine



Corn starch is powder through flooding, broken, separate, refining and dry from corn as raw materials, the color and luster is pure white, the smell is pure, widely used in food, medicine, starch deep processing, chemical industry,etc.

FCC4
Item
Limit
Result
Assay
98.5~101.5%
99.8%
pH
5.5~7.0
5.9
Specific rotation[a]D20
+26.5°~+29.0°
+28.2°
Heavy metals(Pb)
≤20ppm
<20ppm
Loss on drying
≤0.30%
0.10%
Residue on ignition
≤0.20%
0.01%
AJI92
Item
Limit
Result
Assay
99.0~100.5%
99.9%
pH
5.5~6.5
6.0
Specific rotation[a]D20
+27.6°~+29.0°
+28.2°
State of solution
≤20ppm
clear & colorless
(Transmittance T430)
≤0.30%
99.1%
Chloride(Cl)
≤0.20%
<0.02%
Ammonium(NH4)
≤0.02%
<0.02%
Sulfate(SO4)
≤0.02%
<0.02%
Iron(Fe)
≤10ppm
<10ppm
Heavy metals(Pb)
≤10ppm
<10ppm
Arsenic(As2o3)
≤1ppm
<1ppm
Other amino acids
≤0.5%
<0.5%
Loss on drying
≤0.20%
0.11%
Residue on ignition
≤0.10%
0.02%
USP24
Item
Limit
Result
Assay
98.5~101.5%
?99.8%
pH
5.5~7.0
5.8
Specific rotation[a]D20
+26.6°~+28.8°
+28.2°
Chloride(Cl)
≤0.05%
<0.05%
Sulfate(SO4)
≤0.03%
<0.03%
Iron(Fe)
≤30ppm
<30ppm
Heavy metals(Pb)
≤15ppm
<15ppm
Arsenic(As)?
≤1.5ppm
<1.5ppm
Loss on drying
≤0.30%
0.08%
Residue on ignition
≤0.10%
0.02%
Organic volatile impurities
conform
conform