Specifications
| Test | Specification |
| Characteristics | White or alm white powder |
| Identification | Meets EP specification |
| PH | 4.0-6.0 |
| Loss on drying | ≤3.5% |
| Optical | -63°˜-73° |
| Sulfateed ash | ≤1.0% |
| Sulfate(dried basis) | 16.0%-18.0% |
| Content (Dry basis HPLC) | Colistin E1-I≤10% |
| Colistin E1-7MOA≤10% | |
| Colistin E3≤10% | |
| E1+E2+E3+E1-7MOA≥77.0% | |
| Related substance | Any impurity≤4.0% |
| Total impurity | ≤23.0% |
| Potency(Moisture basis) | |
| Potency(Dried basis) | ≥19000IU/mg |
