| Water | ≤ 1.0% |
| Specific rotation | +206 to +214° |
| Conclusion | This product complies with USP Standard |
| Heavy metals | ≤ 0.002% |
| pH | 4.2~7.0 |
| Bacterial endotoxin | ≤ 0.2EU/mg |
| Solubility | Very soluble in water. Soluble in methanol. Sparingly soluble in DMF and acetone. Insoluble in ether and chloroform |
| Sterility | Meets the requirement |
| Retest Date | 2 years from previous retest |
| Crystallinity | Meets the requirement |
| Appearance | White to off-white, granules or powder |
| Assay (Anhydrous) | 92.7~97.0% (as C16H16N3O7S2); 97.5~102.0% (as C16H16N3NaO7S2) |
| Identifcation | A: The chromatogram of the assay preparation obtained as directed in the assay exhibits a major peak for cefoxitin, the retention time of which corresponds to that exhibited in the chromatogram of the standard preparation obtained as directed in the Assay. B: UV. C: It responds to tests for sodium. C: IR |
| Limit of Acetone | ≤ 0.7% |
| Limit of Methanol | ≤ 0.1% |
