Appearance A white to off white solid Identification A.HPLC:RRT test solution is similar to RRT reference solution B.IR: similar to reference substance Specific rotation -8°~ -12° Chlorides Not more than 100ppm Loss on drying Not more than 2.0% Sulfated ash Not more than 0.1% metals Not more than 10ppm Related substances ALD3 Not more than 0.15% ALD2 Not more than 0.15% TK1-10 Not more than 0.15% TK1-9 Not more than 0.15% Any other individual impurity ≤0.10% Total impurities ≤1.0% Enantiomer Not more than 0.15% Acetates Not more than 3000ppm Residual solvents Methanol 3000ppm max Ethanol 5000ppm max Ethyl ethe 5000ppm max Isopropanol 5000ppm max Acetonitrile 410ppm max Dichloromethane 600ppm max Tert-butyl methyl ethe 5000ppm max Hexane 290ppm max Isopropyl ethe 5000ppm max Ethyl acetate 5000ppm max Tetrahydrofuran 720ppm max 1,4-Dioxane 380ppm max Toluene 890ppm max Assay 98.0~102.0%(on the dried basis)