Description

White crystals or crystalline powder

conforms

Identification(IR)

concordant with the reference  spectrum

conforms

assay

99.0~101.0%

99.3%

PH

5.2~6.2

5.7

Specific rotation[a]D20

-27.6°~-29.0°

-28.6°

State of solution

(Transmittance T430)

clear & colorless

≥98.0%

clear & colorless

99.3%

Chloride(Cl)

≤0.02%

<0.02%

Ammonium(NH4)

≤0.02%

<0.02%

Sulfate(SO4)

≤0.02%

<0.02%

Iron(Fe)

≤10ppm

<10ppm

Heavy metals(Pb)

≤10ppm

<10ppm

Arsenic(As)

≤1ppm(As2O3)

<1ppm

Other amino acids

conforms

conforms

Loss on drying

≤0.20%

0.16%

Residue on ignition

≤0.10%

0.05%

Conclusion 

Passed test according to the Standard of AJI92.