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DL-Methionine
  Quality standard:USP, FCC, EP4
CAS No.: 59-51-8
Kosher:√
Halal:√
Class:

Chemical Name: DL-2-Amino-4-(methylthio)butyric acid

 

Structure Formula: CH3SCH2CH2CH(NH2)COOH
Molecular Formula: C5H11NO2S
Molecular Weight: 149.21
Cas No: 59-51-8
Characteristics: White flake crystal powders, have a special smell, bulk density 1.34g/cm 3 , melting at 281oC, It's soluble in water, slightly soluble in alcohol, belongs of sulfur amino acid and non-toxic.
Quality Standards: EP4, FCCIV , USP24,

 

Items EP 4 FCC USP
Appearance White flake crystal powders White flake crystal powders White crystal or crystalline powder
Assay (on dry matter) 99%~101% 98.5%-101.5% 99.0-101.5%
Specific rotation -0.05°- +0.05° - -- ---
Loss on drying 0.5% Max 0.5% Max ≤ 0.3%
Residue on ignition 0.1% Max 0.1% Max ≤ 0.4%
Chlorides 200ppm Max - -- ≤ 0.05%
Sulphates 200ppm Max - -- ≤ 0.03%
Arsenic - -- 1.5 ppm Max ---
Heavy metals 20ppm Max 20ppm Max ≤ 0.0015%
Iron(Fe) --- --- ≤ 0.003%
Organic volatile impurities --- --- Conforms

 

Packaging and Storage: In 25kgs f iber drum double polyethylene bags inside or In 25kgs kraft paper bags Preserve in well-closed containers, at controlled room temperature.
Recommended limit: 1 year.