| Name:Nifuroxazide CAS NO.965-52-6 M.F:C12H9N3O5 M.W:275.22 Appearance:Yellow crystalline powder |  |
The detailed specifications are as below:
| Test Items | Specification |
| Appearance | Bright yellow crystalline powder |
| Solubility | Practically insoluble in water, slightly soluble in alcohol and in methylene chloride. |
| Identification by IR | The IR spectrum matches nifuroxazide standard spectrum. |
| Loss on drying | ≤0.5% |
| Heavy metal(as Pb) | ≤0.002% |
| Sulphated ash | ≤0.1% |
| Impurity A | ≤0.05% |
| Related substance | Impurity A max. 0.05% – B,C,D each max. 0.3%, only one max. 0.1% allowed – E max. 0.3% – Unspecified impurities each max. 0.1% – Sum of impurities others than E max. 0.5% |
| UV absorption | The specific absorption at about 367nm is between940-1000 |
| Assay (on dried) | 98.5%-101.5% |