Tests:

Specifications:

Results:

appearance

white or colorless crystalline

complies

assay

99.0% to 101.0%

99.52%

state of solution

(transmittance)

≥98.0% clear and colorless

98.40%

chloride

≤0.1%

<0.041%

ammonium

≤0.02%

<0.02%

sulfate

≤0.05%

0.02%

iron

≤5mg/kg

<5mg/kg

heavy metals

≤10ppm

<10ppm

arsenic

≤0.5mg/kg

<0.5mg/kg

other amino acids

complies

complies

loss on drying

≤0.50%

0.26%

specific rotation

+24.90 ~ +25.30

+250

ph

6.7 ~ 7.5

7.17