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