CAS number： 115550-35-1
Molecular formula： C17H19FN4O4
molecular weight： 362.3556
Chemical structure：
| Name of Product: | Marbofloxacin | |
| Shelf Life: | 5 years | |
| Specification: | EP8 | |
| Test Items | Specification | Results of Analysis |
| Appearance | Light yellow crystalline powder | Conforms |
| Solubility | Slightly soluble in water, sparingly soluble or slightly soluble in methylene chloride, very slightly soluble in ethanol (96 percent) | Conforms |
| Identification | Conforms to the marbofloxacin CRS | Conforms |
| Absorbance | ≤0.20 | 0.08 |
| Loss on drying | ≤0.5% | 0.12% |
| Sulphated ash | ≤0.1% | 0.05% |
| Heavy metals | ≤20ppm | ＜20ppm |
| Related substance (HPLC) | Impurity A≤0.1% | Not detected |
| Impurity B≤0.1% | Not detected | |
| Impurity C≤0.2% | 0.06% | |
| Impurity D≤0.2% | Not detected | |
| Impurity E≤0.2% | Not detected | |
| Any other single impurity≤0.2% | Not detected | |
| Total impurities≤0.5% | 0.06% | |
| Residual solvents | ethanol≤5000ppm | 309ppm |
| toluene≤890ppm | 457ppm | |
| methylene chloride≤600ppm | Not detected | |
| Assay | 99.0% to 101.0% (dried substance) | 100% |
