Contact person: Mr.Toby
E-mail: toby(at)international-biz(dot)com
MSN: shh1986126(at)hotmail(dot)com
Skype: toby1986126
Yahoo: shh1986126(at)yahoo(dot)com
Mobile:86-13971092670
Name: L-Methionine
Synonyms: L-2-Amino-4-(methylthio)butyric acid
Molecular Formula: C5H11NO2S
Molecular Weight: 149.21
CAS Registry Number: 63-68-3
Appearance White crystals or crystalline powder
Identification Meets the requirements
Assay 98.5% ~ 101.5%
Specific rotation +22.4degree ~ +24.7degree
Chloride(Cl) NMT 0.05%
Sulfate(SO4) NMT 0.03%
Iron(Fe) NMT 0.003%
Heavy metals, as Pb NMT 15ppm
Loss on drying NMT 0.30%
Residue on ignition NMT 0.4%
Chromatographic purity
Not more than 0.5% of any individual
impurity is found;
Not more than 2.0% of total impurities is
found
Organic volatile impurities Meets the requirements
pH 5.6 ~ 6.1
Use:As an essential amino acid, methionine is not synthesized de novo in humans, who must ingest methionine or methionine-containing proteins. In plants and microorganisms, methionine is synthesized via a pathway that uses both aspartic acid and cysteine.
Permanent link: http://www.vvchem.com/sell/cas:63-68-3,3264453.html