Oseltamivir Impurity 138 CAS CATO-C4X-1720138
| CAS No. | CATO-C4X-1720138 |
| Molecular Formula | C17H29NO3 |
| Molecular Weight | 295.42 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
As a process- or degradation-related impurity, Oseltamivir Impurity 138 (CAS CATO-C4X-1720138, C17H29NO3) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Oseltamivir Impurity 138 (C17H29NO3) contains a steroid core, an amide group, a hydroxyl group, an ether linkage. Its high carbon-to-hydrogen ratio confers good lipid solubility, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C17H29NO3 |
| Molecular Weight | 295.42 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 1 |
Related Oseltamivir Standards
- Oseltamivir impurity N1 (CAS 1268086-96-9)
- Oseltamivir Impurity 163 (CAS CATO-C4X-1720163)
- Oseltamivir Impurity 166 (CAS 204254-98-8)
- Oseltamivir Impurity 93 (CAS CATO-C4X-172093)
- Oseltamivir EP Impurity E (CAS 208720-71-2)
- Oseltamivir Impurity 244 (CAS CATO-C4X-1720244)
- Oseltamivir Impurity 124 (CAS CATO-C4X-1720124)
- Oseltamivir impurity 266 (CAS 2762080-42-0)
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- 2-(Benzofuran-2-yl)-1-ethyl-1H-imidazole (CAS 732961-66-9)
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- 5-Bromo-2-hydroxybenzenesulfonyl chloride (CAS 123221-93-2)
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