Fexofenadine Impurity 14 CAS CATO-C4X-179414
| CAS No. | CATO-C4X-179414 |
| Molecular Formula | C32H36NO3 |
| Molecular Weight | N/A |
| 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.
CATO supplies Fexofenadine Impurity 14 (CAS CATO-C4X-179414), a pharmacopoeial impurity reference standard (molecular formula C32H36NO3Na, MW 505.63 g/mol) used for the identification and quantification of trace impurities in APIs.
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, Fexofenadine Impurity 14 is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 505.63 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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 | C32H36NO3 Na |
| Molecular Weight | 505.63 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at room temperature, 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 |
| Degree of Unsaturation (DBE) | 15.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 1 |
Related Fexofenadine Standards
- Fexofenadine Impurity 13 (CAS 1010812-98-2)
- Fexofenadine EP Impurity E (CAS 115-46-8)
- Fexofenadine EP Impurity G (CAS 1187954-57-9)
- Fexofenadine Impurity 23 (CAS 1208313-13-6)
- Fexofenadine-d10 HCl (CAS 1215821-44-5)
- Fexofenadine-d6 Methyl Ester (CAS 1286458-00-1)
- Fexofenadine Impurity 11 (CAS 1347311-10-7)
- Fexofenadine Impurity 40 (CAS 1390644-37-7)
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Why CATO?
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