Fexofenadine Impurity 25 CAS 174483-06-8
| CAS No. | 174483-06-8 |
| Molecular Formula | C34H43NO4 |
| Molecular Weight | 529.71 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a process- or degradation-related impurity, Fexofenadine Impurity 25 (CAS 174483-06-8, C34H43NO4) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Based on its molecular formula C34H43NO4, Fexofenadine Impurity 25 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 529.71 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).
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 | C34H43NO4 |
| Molecular Weight | 529.71 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 methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 14.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2006 |
| Nitrogen Atoms | 1 |
Related Fexofenadine Standards
- Fexofenadine-d6 Methyl Ester (CAS 1286458-00-1)
- Fexofenadine N-Oxide (CAS 1422515-52-3)
- Fexofenadine Impurity 17 (CAS 154477-55-1)
- Fexofenadine EP Impurity D (CAS 154825-96-4)
- Fexofenadine Impurity 45 (CAS CATO-C4X-179445)
- Fexofenadine Impurity 24 (CAS 908595-88-0)
- Fexofenadine Impurity 19 (CAS CATO-C4X-179419)
- Fexofenadine Impurity 31 (CAS CATO-C4X-179431)
Recommended Standards
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- Iguratimod Impurity 49 (CAS CATO-C4X-182649)
- 6,9-Dihydroxybenzo[g]isoquinoline-5,10-dione (CAS 4589-37-1)
- Camptothecin Impurity 9 (CAS 67656-30-8)
- 1-(2,4,6-Trichlorophenyl)-3-(2-chloro-5-aminoanilino)-5-pyrazolone (CAS 86491-51-2)
- (2-Methoxypyridin-3-yl)boronic acid hydrochloride (CAS 2096334-59-5)
- Methyl 2-methyl-1,6-dioxaspiro[2.5]octane-2-carboxylate (CAS 1517946-89-2)
- tert-Butyl 1-(aminomethyl)-3-azabicyclo[3.1.0]hexane-3-carboxylate (CAS 1511379-27-3)
- ([13C6]Leu14)-Glucagon (1-29) (human, rat, porcine) trifluoroacetate salt (CAS 1802078-39-2)
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