Oseltamivir impurity 277 CAS CATO-C4X-1720277
| CAS No. | CATO-C4X-1720277 |
| Molecular Formula | C20H35NO5 |
| Molecular Weight | 369.50 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C20H35NO5, Oseltamivir impurity 277 contains a steroid core, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 369.50 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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).
CATO supplies Oseltamivir impurity 277 (CAS CATO-C4X-1720277), a pharmacopoeial impurity reference standard (molecular formula C20H35NO5, MW 369.50 g/mol) used for the identification and quantification of trace impurities in APIs.
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 277 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 | C20H35NO5 |
| Molecular Weight | 369.50 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 methanol, acetonitrile, DMSO, water (slightly soluble) |
| 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 127 (CAS CATO-C4X-1720127)
- Oseltamivir impurity 276 (CAS 2413185-98-3)
- Oseltamivir Impurity 284 (CAS CATO-C4X-1720284)
- Oseltamivir Impurity 98 (CAS CATO-C4X-172098)
- Oseltamivir Impurity 100 (CAS CATO-C4X-1720100)
- Oseltamivir impurity 204 (CAS CATO-C4X-1720204)
- Oseltamivir Impurity 245 (CAS 2765792-93-4)
- Oseltamivir Impurity 257 (CAS CATO-C4X-1720257)
Recommended Standards
- Norelgestromin Impurity 3 (CAS CATO-C4X-17123)
- 1-Benzyl-4-[N-(1-propanoyl)-N-phenylamino]-4-methoxymethylpiperidine-d3 (CAS 1204688-15-2)
- Norelgestromin Impurity 2 (CAS CATO-C4X-17122)
- 4-(Difluoromethyl)-6-hydroxy-3-iodopyridine-2-sulfonyl chloride (CAS 1805058-38-1)
- Bupropion Impurity 73 (CAS 292055-72-2)
- Diphenhydramine Impurity 20 (CAS 65757-61-1)
- Arginine impurity 11 (CAS CATO-C4X-242411)
- 1-(1-Acetyl-pyrrolidine-2-carbonyl)-azetidine-3-carboxylic acid (CAS 1361111-62-7)
- 54605-62-8 3-(4-Ethoxyphenyl)-3-oxopropanenitrile DTXSID60623739 (CAS 54605-62-8)
- 2-Amino-7,7-dimethyl-5-oxo-4-(thiophen-2-yl)-5,6,7,8-tetrahydro-4H-chromene-3-carbonitrile (CAS 153790-54-6)
- Hexarelin TFA salt (CAS 140703-51-1(Free Base))
- Valsartan Impurity 57 (CAS 1353844-77-5)
- 17-Hydroxypregn-4-en-3-one (CAS 1235-97-8)
- Semaglutide impurity 68 (CAS CATO-C4X-222668)
Why CATO?
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