Oseltamivir Impurity 259 CAS CATO-C4X-1720259
| CAS No. | CATO-C4X-1720259 |
| Molecular Formula | C14H23NO3 |
| Molecular Weight | 253.34 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 259 (CAS CATO-C4X-1720259, C14H23NO3) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Oseltamivir Impurity 259 (C14H23NO3) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, 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 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).
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 | C14H23NO3 |
| Molecular Weight | 253.34 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | ≥95% |
| 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; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 1 |
Related Oseltamivir Standards
- Oseltamivir Impurity 164 (CAS 204255-02-7)
- 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)
- Oseltamivir Impurity 61 (CAS 2413185-89-2)
- Oseltamivir Impurity 63 (CAS 1266663-89-1)
- Oseltamivir Impurity 64 (CAS 2413185-88-1)
Recommended Standards
- Verapamil Impurity 51 (CAS CATO-C4X-177851)
- Betaxolol Impurity 9 (CAS 131564-69-7)
- Nebivolol Impurity 28 (CAS 112068-01-6)
- Metoprolol Impurity 10 (CAS 131564-70-0)
- Travoprost Impurity 36 Sodium Salt (CAS CATO-C4X-192536)
- Atracurium Impurity 40 (CAS 109717-73-9)
- Treprostinil Impurity 3 (CAS CATO-C4X-21163)
- Butanol, fluoro-(mix) (CAS 61599-24-4)
- 4-Methyl-5-(3-(m-tolyl)-1,2,4-oxadiazol-5-yl)thiazol-2-amine (CAS 937681-19-1)
- Brivaracetam impurity 109 (CAS 53657-15-1)
- 8-bromo-6-(chloromethyl)imidazo[1,2-a]pyridine (CAS 1823061-56-8)
- 3-Azabicyclo[3.3.0]octane Hydrochloride (CAS 112626-50-3)
- 2-(2-Bromobenzo[d]thiazol-6-yl)acetonitrile (CAS 924287-70-7)
- Semaglutide impurity 89 (CAS CATO-C4X-222689)
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