Items             

CP standard       

USP standard

FCC standard

Assay

≥98.5%

≥98.5%

≥98.5%

Light transmittance

≥98.0％

——

≥95.0％

Specific rotation

-33.0°— -35.0°

-32.7°— -34.7°

-33.2°— -35.2°

PH value

5.4-6.0

5.4-6.0

5.4-6.0

Chloride

≤0.02%

≤0.05%

——

Sulfate

≤0.02%

≤0.03%

——

Ammonium

≤0.02％

——

——

Loss on drying

≤0.2%

≤0.3%

≤0.2%

Residue on ignition

≤0.1%

≤0.4%

≤0.1%

Iron

≤0.001%

≤0.003%

≤0.001%

Heavy metals

≤0.001%

≤0.0015%

≤0.0005%

Arsenic

≤0.0001％

——

——

Other amino acids

Comply with the standard

Comply with the standard

Comply with the standard

Bacterial endotoxin

The amount of bacterial endotoxin in every 1g of this product should be less than 25EU

          ——

          ——