Item	Standard	Result
Appearance	Yellow Crystal Powder	Yellow Crystal Powder
Identification	Positive	Positive
Assay	97.0%-103.0%	99.47%
Acidity	4.5-7.0	5.80
Loss on drying	≤0.50%	0.12%
Residue on ignition	<0.10	<0.10
Melting Point	257-259℃	257.8℃
Substance In Ethanoe	≤0.4%	0.25%
Nitrofurfural  diacetate	≤1.0%	<0.20%
Conclusion:Complying with BP98.