Item

Standard

Analysis data

Assay

98.5～101.0%

98.90%

pH

4.5～5.5

4.72

Specific rotation[a]D25

+8.3°～+9.5°

+8.59°

State of solution
(Transmittance )

≥95.0%

98.8%

Chloride(Cl)

≤0.04%

＜0.04%

Ammonium(NH4)

≤0.02%

＜0.02%

Sulfate(SO4)

≤0.03%

＜0.03%

Iron(Fe)

≤10ppm

＜10ppm

Heavy metals(Pb)

≤10ppm

＜10ppm

Arsenic(As)

≤1ppm

＜1ppm

Other amino acids

Chromatographically not detectable

conforms

Loss on drying

≤0.50%

0.04%

Residue on ignition

≤0.10%

0.09%

Conclusion

The product conforms to the standard AJI92