Appearance White crystal or crystalline powder
Identification Infrared absorption
Specific rotation +5.7~+6.8°
Loss on drying 8.0-12.0%
Residue on ignition 0.4% max
Sulfate 0.03% max
Iron 0.003% max
Heay metals 0.0015% max
Chromatographic impurity, as USP30(TLC) Individual impurity: 0.5% max
Total impurity: 2.0% max
Organic volatile impurities Meets the requirement
Assay 98.5-101.5%
