Oseltamivir Impurity 159 CAS CATO-C4X-1720159
| CAS No. | CATO-C4X-1720159 |
| Molecular Formula | C8H12O7S |
| Molecular Weight | 252.24 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Oseltamivir Impurity 159 meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Oseltamivir Impurity 159 (CAS CATO-C4X-1720159) is a certified pharmaceutical impurity reference standard with the molecular formula C8H12O7S and a molecular weight of 252.24 g/mol.
Oseltamivir Impurity 159 (C8H12O7S) contains a carbohydrate-derived structure, a sulfone group. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.
Physical & Chemical Properties
| Molecular Formula | C8H12O7S |
| Molecular Weight | 252.24 g/mol |
| Purity | >95% |
| Storage | Store in a cool place (≤25°C), keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| Sulfur Atoms | 1 |
Related Oseltamivir Standards
- Oseltamivir Impurity 160 (CAS CATO-C4X-1720160)
- Oseltamivir Impurity 161 (CAS CATO-C4X-1720161)
- Oseltamivir Impurity 164 (CAS 204255-02-7)
- Oseltamivir Impurity 259 (CAS CATO-C4X-1720259)
- Oseltamivir Impurity C62 (CAS 1217834-81-5)
- Oseltamivir Impurity 145 (CAS 2714884-77-0)
- Oseltamivir Impurity 220 (CAS CATO-C4X-1720220)
- Oseltamivir Impurity 239 (CAS CATO-C4X-1720239)
Recommended Standards
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- (5E)-5-[(2-{[(4-chlorophenyl)methyl]sulfanyl}-5-nitrophenyl)methylidene]-3-ethyl-2-sulfanylidene-1,3-thiazolidin-4-one (CAS 301193-96-4)
- (1-Ethyl-1h-imidazol-5-yl)methanesulfonyl chloride (CAS 1497189-46-4)
- 3-(Isothiocyanatomethyl)-2,2,5,5-tetramethyl-1-pyrrolidinyloxy (CAS 78140-52-0)
- 4-Bromo-6-(difluoromethyl)-2,3-difluoropyridine (CAS 1804704-57-1)
- Semaglutide impurity 289 (CAS CATO-C4X-2226289)
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