Specific rotation[a]D20°

-215°～-225°

State of solution

≥98.0%

Heavy metals(Pb)  

≤10PPm

Residue on ignition                           

≤0.1%  

Iron(Fe)

≤20PPm

Loss on drying                              

≤0.02%  

Other amino acids                          

Conforms  

Arsenic(As2O3) 

≤1PPm   

Chloride(CI) 

≤0.02%

Ammonium(NH4)

≤0.02%

Sulfate(SO4)    

≤0.02%

Assay                                  

98.0～101.0%             

PH

5～6.5