Appearance and solubility：White or almost white,crystalline powder.It has a sweet taste. Freely soluble in water,sparingly soluble in ethanol(96%)
Identification 
A: Specific optical rotation ＋52.5º—＋53.3º
B: TLC Complies
C: Chemical test (red precipitate) Positive
Acidity or alkalinity  ：6g sample 0.1mol/L NaOH≤0.15ml
Water：Not more than 1.0%
Arsenic：Not more than 1ppm
Calcium：Not more than 200ppm
Lead in sugars：Not more than 0.5ppm
Chloride：Not more than 125ppm
Sulphates：Not more than 200ppm
Appearance of solution：Solution is clear and not more intensely colored than reference solution
Barium：Any opalescence in the solution is not more intense than in the standard
Sulphites：≤15ppmSO2
Foreign sugars,soluble starch,dextrins：Qualified
Sulphated ash：0.1%
Pyrogens (TAL 10% solution): ＜0.125Eu/ml
Bacterium：Not more than 800 single/g
Mildew：Not more than 80 single/g
Coliform：Should not be found