Appearance    White powder
Solubility    Soluble in water at a concentration of 2mg/ml to give a clear, colorless solution
Specific optical rotation    -70.0° to -90.0°(c = 0.5, 1%Hac)
Purity     ≥98.0%
Related substances (HPLC)    Total impurities（%）: ≤2.0%
Any impurity（%）: ≤1.0%
Water     ≤8.0%
Amino Acid Composition    ± 10% of theoretial
Bacterial Endotoxins :    ≤50IU/mg
Assay     97%-103%
Identification    Conform
Hac content    <13.0%