Chemical Name

L-Methionine  

Molecular Structure

Molecular Formula

C5H11NO2S

Molecular Weight

149.21

Characteristics

White crystalline powder

Packing

25㎏/drum，25㎏/carton

Quality  Standard

AJI92/USP28/EP5/FCCIV

Specification                                                                     

Specific rotation[a]_D^20°          

+23.0°~+24.5°          

State of solution

Clear and colorless

(Tranamittance)

≥98.0%

Chloride(Cl)

≤0.02%

Ammonium(NH4)                    

≤0.02%               

Sulfate(SO4)                            

≤0.020%       

Iron(Fe)                             

≤10PPm           

Heavy metals(Pb)                   

≤10PPm              

Arsenic(As₂O₃)                     

≤1PPm               

Other amio acids

Conforms

Loss on drying                      

≤0.20%

Residue on ignition (Sulfated)                          

≤0.10%

Assay                                   

99.0～100.5%             

PH                                         

5.6～6.1