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Identification (IR, UV): A:IR, B:UV,3.0%max. Specific rotation: +82º to +88º Chromatographic purity: Principal impurity: 1.0% max. Total impurities: 2.0% max. Loss on drying:
hydrous form: 3.5%~4.0%, anhydrous form: 0.4%max. Residue on ignition: 0.1% max. Heavy metals: 0.002% max. Residual Solvents: Acetone: 1000ppm max. Assay (on the dried basis): 97.0% - 102.0%