Specifications:
Items Standard Analysis data
Identification IR,TLC conforms
Appearance White crystalline powder，or colourless crystals,odourless conforms
Appearance of Solution (C=2% m/v in water) Clear conforms
Melting range Not less than 202℃(between 2℃) 207℃-208℃
Iron Not more than 0.002% conforms
Lead Not more than 0.002% conforms
Related substance(TLC) Sum of impurities Not more than
2.0% conforms
Loss on Drying Not more than 0.5%（drying at 105℃） 0.13%
Sulphates ash Not more than 0.1% 0.09%
Assay 98.5% to 101.5%（calculated on the dried substance） 98.97%