Fexofenadine Impurity 32 CAS CATO-C4X-179432
| CAS No. | CATO-C4X-179432 |
| Molecular Formula | C39H43NO6 |
| Molecular Weight | 621.76 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Fexofenadine Impurity 32.
Fexofenadine Impurity 32 (CAS CATO-C4X-179432) is a certified pharmaceutical impurity reference standard with the molecular formula C39H43NO6 and a molecular weight of 621.76 g/mol.
Based on its molecular formula C39H43NO6, Fexofenadine Impurity 32 contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 621.76 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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.
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 | C39H43NO6 |
| Molecular Weight | 621.76 g/mol |
| Purity | ＞95% |
| Storage | Store at room temperature, 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) | 19.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 1 |
Related Fexofenadine Standards
- Fexofenadine Impurity 33 (CAS CATO-C4X-179433)
- Fexofenadine Impurity 46 (CAS CATO-C4X-179446)
- Fexofenadine Impurity 36 (CAS CATO-C4X-179436)
- Fexofenadine Impurity 37 (CAS CATO-C4X-179437)
- Fexofenadine Impurity 38 (CAS CATO-C4X-179438)
- Fexofenadine Impurity 34 (CAS CATO-C4X-179434)
- Fexofenadine Impurity 35 (CAS CATO-C4X-179435)
- Fexofenadine Impurity 24 (CAS 908595-88-0)
Recommended Standards
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