Appearance：White to almost white crystalline powder
Melting Point：129.0-132.0℃
Specific rotation：-55° ~ -60°
Related Substance：Total: ≤ 1.0% Single: ≤0.5%
Optical isomer：≤0.5%
Assay(on dried basis)：≥98.5%
The product CONFORMS to above specification
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