Specific rotation[a]D20°          

-33.5°~-36.5°         

State of solution

Clear and colorless

(Tranamittance)

≥98.0%

Chloride(Cl)

≤0.039%

Ammonium(NH4)                    

≤0.02%               

Sulfate(SO4)                            

≤0.020%       

Iron(Fe)                             

≤30PPm           

Heavy metals(Pb)                  

≤10PPm              

Arsenic(As2O3)                     

≤1PPm               

Other amino acids                  

Chromatographically  not detectable 

Loss on drying                      

≤0.30%

Residue on ignition (Sulfated)                          

≤0.10%

Assay                                  

98.5~101.0%             

PH                                         

2.0~3.5