Appearance:               White or almost white powder 
Identification:              IR Meet with the requirements 
Appearance of solution:            Clear, Color <Y7
Solubility:             Very slightly soluble in water, Soluble in methanol, Slightly soluble in alcohol         Angle of optical rotation:           -0.1° ~ +0.1° 
Related Substances:          Each impurity 0.25% Max
                                              Total impurity 0.5% Max 
Melting Point:                   178℃ ~ 182℃ 
Loss on drying:                    0.5% Max  
Sulphated ash:                     0.1% Max 
Assay:                         99.0% ~ 101.0%