Assay

99.0％~101.0％

Transmittance

≥98.0％

Specific rotation

+39.5°~+41.5°

Chloride(Cl)

≤0.020％

Amonium(NH4)

≤0.02％

Sulfate(SO4)

≤0.020％

Iron(Fe)

≤10ppm

Heavy metals(Pb)

≤10ppm

Arsenic(As2O3)

≤1ppm

Other amino acids

conforms

Loss on drying

≤0.20％

Residue on ignition

≤0.10％

PH value

5.5~6.5