Appearance White crystals or crystalline powder
Assay 98.5%min
Identification Meet the requirements
Specific rotation [α]D25 +22.4°~+24.7°
Chloride(Cl) 0.05% max
Sulfate(SO4) 0.03% max
Iron(Fe) 0.003% max
Heay metals(Pb) 0.0015% max
Loss on drying 0.30% max
Residue on ignition 0.40%max
Chromatographic purity Not more than 0.5% of any
individual impurity is found；
Not more than 2.0% of total
impurities is found
Organic volatile impurities Meets the requirements
pH 5.6~6.1
