Items |
Standard |
Appearance |
White or slightly yellowish, slightly hygroscopic, crystalline powder. |
Solubility |
Sparingly soluble in water, free soluble in methanol, soluble in ethanol,slightly soluble in acetone. |
Identification |
A. IR |
D. Tests of Potassium salt |
Appearance of solution |
The solution is clear |
UV 440nm NMT 0.05 |
Related substances (HPLC) |
Impurity A: NMT 0.15% |
Impurity F: NMT 0.15% |
Any individual impurity NMT0.1% |
Total impurities NMT 0.4% |
Melt point |
About 280℃,with decomposition |
Heavy metals |
NMT 10ppm |
Loss on drying |
NMT 0.5%(1.000g, 105,3 hrs) |
Assay |
99.0~101.0 %(dried substance) |