Appearance White crystals or crystalline powder
Assay 98.5-101.5%
Specific rotation +13.7°~ +15.1°
PH 5.5-7.0
Loss on drying 0.2% max
Residue on ignition 0.15% max
Chloride 0.05% max
Sulfate 0.03% max
Iron 0.003% max
Heay metals(as Pb) 0.0015% max
Chromatographic purity Total impurity: 2.0% max
Individual impurity: 0.5% max
