Item

Limit

Test result

Appearance

White or colorless crystal

Passed

Assay

99.0% ~ 100%

99.15%

state of solution

(transmittance)

Clear and colorless not less than 98.0%

98.6%

chloride (cl)

Not more than 0.039%

Not more than 0.039%

Ammonium(NH4)

Not more than 0.02%

Not more than 0.02%

Sulfate(so4)

Not more than 0.028%

Not more than 0.028%

Iron (Fe)

Not more than 5PPM

Not more than 5PPM

Heavy metals (pb)

Not more than 5 PPM

Not more than 1 PPM

Arsenic (ASO3)

Not more than 0.5PPM

Not more than 0.5 PPM

Other amino acids

Conforms

Conforms

Loss on drying

Not more than 0.30%

0.25%

specific rotation (a)20

+24.7 ~+25.3

25.0

PH

6.8~7.2

7.0