Test Items Specifications Results
Appearance Crystalline, yellow -orange, odorless powder Conforms
Solubility Soluble in methanol, chloroform and alcohol, insoluble in water Conforms
E
458--486 Conforms
Heavy metals No more than 10ppm ≤10ppm
Melting point 52.0 ~ 55.0℃ 52.5.0 ~ 53.5℃
Loss on drying No more than 0.5% 0.02%
Residue on ignition No more than 0.1% 0.03%
Impurities(HPLC) No more than 0.8% 0.77%
Assay(HPLC) No less than 98.5% on the anhydrous basis 98.7%
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