Specific rotation[a]D20°          

+5.5°～+7.0°

+8.0 ～+10.1°

Calc.as.cysteine

State of solution

Clear and colorless

Heavy metals(Pb)  

≤10PPm

Residue on ignition                           

≤0.1%

Iron(Fe)

≤10PPm

Loss on drying                              

8.5～12.0％

Other amino acids                          

Chromatographically not detectable

Arsenic(As2O3) 

≤1PPm

Chloride(CI) 

19.89～20.29％

Ammonium(NH4)

≤0.02%

Sulfate(SO4)    

≤0.02%

Assay                                  

99.0～100.5%

PH

1.5～2.0