Appearance: white granular powder; smellless & sweet;  
Specific optical rotation: +52.6^o-+53.2^o;
Acidity:   ≤ 0.2ml;  
Clarity of solution: ≤ 1# of turbidity standard;
Clarity of ethanol solution: clear;  
Chloride: ≤ 0.01%;
Sulfate: ≤0.01%;
Sulfite and soluble starch: meet the specification;
Loss on dry: ≤1.0%;
Residue on ignition: ≤0.1%;
Protein: meet the specification;  
Barium salt: meet the specification;  
Calcium salt: ≤0.01%;  
Ferric salt: ≤0.001%;
Heavy metals: ≤4ppm;
Arsenic salt: ≤0.0001%;
Microbial limits: meet the specification 
Bacterial endotoxin: ≤0.25Eu/ml