| ITEM | STANDARD | RESULTS |
| Appearance | White or almost white crystalline powder | White crystalline powder |
| Dissolution | Easily solubale in water, solubale in 95% alcohol | Complies |
| Indentification | (1) Should be positive respond (2) IR graphs should be conforms to the reference standard |
Complies |
| pH | 7.0~9.0 | 7.94 |
| Clarity | should be not more than 1# working standard solution | Complies |
| Color | Should be lighter than the standard solution | Complies |
| Optical transmission | Not less than 95% | 99.2% |
| Water | 19.0~21.0% | 19.66% |
| Chlorides | Not more than 0.01% | Complies |
| Sulfates | Not more than 0.05% | Complies |
| Residual organic solvents | Not more than 0.3% of methanol Not more than 0.5% ofethanol |
Not detected 0.35% |
| Sulfated ash | Not more than 0.1% | Complies |
| Relative substance | Total impurity not more than 0.5% | 0.055% |
| Heavy Metal | Not more than10ppm | Complies |
| Microbiological quality | Should meet the requirements | Complies |
| Bacterial endotoxins | Not more than 0.35 IU/mg | Complies |
| Assay | No less than 99.0% and not more than 101.0% of C6H14N2O2 2H2O | 99.89% |
| Conclusion | The product complies to Enterprise standard | |
