Detailed Description  Item Limit Result  Assay 98.5∼101.0% 99.7%  Specific rotation [a]D20 +14.5°∼+16.5° +15.64°  State of solution clear & colorless clear & colorless  Chloride(Cl) ≤200ppm Ammonium(NH4) ≤200ppm Sulfate(SO4) ≤300ppm Heavy metals(Pb) ≤10ppm Loss on drying ≤0.50% 0.04% Residue on ignition ≤0.10% 0.02% Ninhydrin-positive Substances conforms conforms Endotoxin conforms conforms