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Almost white to yellowish Crystalline powder
M.P:142.0~146.0℃
Identification: color reaction,the color of pale blue to purple develops; HPLC,the retention time of principal peak should comply with its CRS.
Specific rotation: -6°~-9°
Single impurity: ≤0.5%
Total impurities: ≤1.0%
Methanol: ≤0.2%
Ethanol: ≤0.3%
Chloride ≤0.02%
Loss on drying ≤4.0%
Sulphated ash ≤0.1%
Heavy metals ≤20ppm
Arsenic ≤20ppm
Assay(dried basis) ≥98.5%
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