CAS number： 73231-34-2
Molecular formula： C12H14Cl2FNO4S
molecular weight： 358.21
Chemical structure：
| Products name | Florfenicol | |
| Shelf life | 2 years | |
| Test item | Acceptatce critoroa | Results |
| Solubility | Very soluble in dimethylformamide soilble in methanol sparingly soluble in Glacial acetic acid, very slighltly soluble in water or in chloroform | comform |
| Identification | A Infrared Absorption--the IR spectrum is accordant with the spextrum obtained with lorfenicol RS | conforms |
| B The Retention time of the major peak in the chromatogram of the sample preparation corresponds to that of the standard preparation as obtained in the assay | conforms | |
| Loss on drying | Not more than 0.5% | 0.15% |
| Specific optical rotation | -16℃to--19℃ | -17.9℃ |
| Melting point | 152-156℃ | 155.3℃ |
| PH | 4.5-7.0 | 6.3 |
| Chlorides | Not more than 0.02% | ≤0.02% |
| Sulphated ash | Not more thanb 0.1% | ≤0.1% |
| Heavy Metals | Not more than 20ppm | ≤20ppm |
| Assay | not less than 98.0% | 99.3% |
| Conclusion | Complies with in-house standar | |
