| TESTING ITEMS | SPECIFICATIONS | RESULTS |
| Appearance | White, off-white or slightly yellow crystalline powder | Confirms |
| Identification | Meets the requirements | Confirms |
| Optical rotation | +8.0°~+9.0° | +8.5° |
| Loss on drying | ≤2.50% | 0.15% |
| Related substance | Single impurity ≤0.10% | 0.01% |
| Total impurities ≤1.0% | 0.23% | |
| Assay (Zinc Content) | 97.0%~102.0% | 99.10% |
| Assay(L-Carnosine content) | 98.0%~102.0% | 99.60% |
| Conclusion: The Product Conforms to USP. |
||
