Oseltamivir Impurity 167 CAS CATO-C4X-1720167
| CAS No. | CATO-C4X-1720167 |
| Molecular Formula | C22H38N2O9 |
| Molecular Weight | 474.55 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The molecular framework of Oseltamivir Impurity 167 (C22H38N2O9) 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. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
CATO supplies Oseltamivir Impurity 167 (CAS CATO-C4X-1720167), a pharmacopoeial impurity reference standard (molecular formula C22H38N2O9, MW 474.55 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 167 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 | C22H38N2O9 |
| Molecular Weight | 474.55 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | >95% |
| Storage | Store in a cool place (≤25°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 168 (CAS CATO-C4X-1720168)
- Oseltamivir Glucose Adduct 1 (CAS CATO-C4X-1720182)
- Oseltamivir Glucose Adduct 23 (CAS CATO-C4X-172023)
- Oseltamivir impurity 234 (CAS CATO-C4X-1720234)
- Oseltamivir Impurity 252 (CAS CATO-C4X-1720252)
- Oseltamivir Impurity 253 (CAS CATO-C4X-1720253)
- Oseltamivir Impurity 254 (CAS CATO-C4X-1720254)
- Oseltamivir Impurity 40 (CAS CATO-C4X-172040)
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- 4-Bromo-2,5-difluoro-3-methylbenzoic acid (CAS 178444-98-9)
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