| ITEM | STANDARD | RESULTS |
| Appearance | White or creamy white crystalline or powder | Conforms |
| Identification | A: The infrared absorption spectrum | Conforms |
| B: The reaction of primary aromatic amines | ||
| C: The tests of sodium | ||
| Clarity and color of solution | Clarity, not more coloured than Y4 | Clarity |
| Acidity | PH=10.0~11.0 | PH=10.7 |
| Related substances | ≤0.5% | <0.5% |
| Loss on drying | ≤2.00% | 1.01% |
| Assay(The dried substance) | 99.0%~101.0% | 99.83% |
| Conclusion | The results conforms with BP2010 standards | |
