Oseltamivir impurity 203 CAS CATO-C4X-1720203
| CAS No. | CATO-C4X-1720203 |
| Molecular Formula | C14H22N2O4 |
| Molecular Weight | 282.34 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Oseltamivir impurity 203 (CAS CATO-C4X-1720203), a pharmacopoeial impurity reference standard (molecular formula C14H22N2O4, MW 282.34 g/mol) used for the identification and quantification of trace impurities in APIs.
The molecular framework of Oseltamivir impurity 203 (C14H22N2O4) is characterized by a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.
As a certified reference material (CRM), Oseltamivir impurity 203 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.
Physical & Chemical Properties
| Molecular Formula | C14H22N2O4 |
| Molecular Weight | 282.34 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 DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 2 |
Related Oseltamivir Standards
- Oseltamivir Impurity 153 (CAS CATO-C4X-1720153)
- Oseltamivir EP Impurity A (CAS 1364932-19-3)
- Oseltamivir EP Impurity C (CAS 187227-45-8)
- Oseltamivir Impurity N42 (CAS 1052063-36-1)
- Oseltamivir Impurity N7 (CAS 1376142-56-1)
- Oseltamivir Impurity 67 (CAS 220626-12-0)
- Oseltamivir EP Impurity C-d3 (CAS CATO-C4X-1720233)
- Oseltamivir-d3 Acid (CAS 1242184-43-5)
Recommended Standards
- Atenolol Impurity 24 (CAS CATO-C4X-154924)
- Trimetazidine Impurity 18 (CAS CATO-C4X-180318)
- Acetylcysteine Impurity 40 (CAS 25779-79-7)
- Ruxolitinib Impurity 118 (CAS CATO-C4X-2058118)
- Desloratadine Impurity 32 (CAS 1346605-16-0)
- Tucatinib Impurity 31 (CAS CATO-C4X-260531)
- Arotinolol Impurity 58 (CAS CATO-C4X-185458)
- 5-Ethyl-N-(2-(imidazo[1,2-a]pyridin-2-yl)ethyl)thiophene-2-sulfonamide (CAS 868978-62-5)
- 3-Ethynyl-4-methoxybenzoic acid (CAS 1197358-11-4)
- 3-(1-Piperazinyl)phenylboronic Acid Pinacol Ester (CAS 871125-87-0)
- ((2S,3S)-3-Methyl-1-tritylaziridin-2-yl)methanol (CAS 167502-57-0)
- Ethyl 4-chloro-7-methoxy-1,8-naphthyridine-3-carboxylate (CAS 2636814-66-7)
- Methyl 4-(ethylamino)butanoate hydrochloride (CAS 1951442-14-0)
- Semaglutide impurity 69 (CAS CATO-C4X-222669)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
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- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com