Complaint
| Item | Standard |
| Appearance | White or similar sheet crystal or powder |
| Solubility in alcohol | clear and no depoist |
| Identification | A:the chloroform acquires a blood-red color and sulfuric aicd shows a green fluorescence. |
| B:a pink color is produced,and it rapidly changes to red,then to blue, and finally to a brilliant green. | |
| Melting range | 147°C-150°C |
| Specific rotation | -34°~-38° |
| Acidity | ≤0.3ml |
| Loss on drying | ≤0.3% |
| Residue on ignition | ≤0.1% |
| Purity | ≥95.0% |
