CAS No.: 63-68-3
Other Names: 2-amino-4-(methylthio)-butyric aci...
EINECS No.: 200-562-9
Place of Origin: China (Mainland)
Type: Vitamins, Amino Acids and Coenzymes
Grade Standard: Food Grade, Medicine Grade
Molecular formula: C5H11NO2S
Descriptions: Colorless or white glossy flake-like crystal, or white crystalline powder. With slight special odor, taste slightly bitter. Melting point 280-281 ºC(dissolution). Instable to strong acid, demethylation can be resulted. Soluble in water(5.6g/100ml,30ºC), warm dilute ethanol, alkaline solution and dilute mineral acids. Difficult to be soluble in ethanol, nearly insoluble in ether.
Applications: Nutrition supplement. One of the essential amino acids for human. DL-Methionine is usually used to replace L-Methionine because they have same effect while L-Methionine costs higher.
Item Index (enterprise standard)
Content (dry basis) 98.5%-101.5%
As(by As,GT-3) ≤1.5mg/kg
Heavy metal (as Pb,GT-16-2) ≤20mg/kg
Pb(GT-18) ≤10 mg/kg
Loss on drying(GT-19,105ºC.2h) ≤0.5%
Residue on ignition(GT-27) ≤0.1%
Specific optical rotation +21°- +25°