Fesoterodine Impurity 4 CAS 250214-55-2
| CAS No. | 250214-55-2 |
| Molecular Formula | C30H43NO4 |
| Molecular Weight | 481.67 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 481.67 g/mol gives Fesoterodine Impurity 4 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
Fesoterodine Impurity 4 (CAS 250214-55-2) is a certified pharmaceutical impurity reference standard with the molecular formula C30H43NO4 and a molecular weight of 481.67 g/mol.
Structurally, Fesoterodine Impurity 4 (C30H43NO4) contains a steroid core, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 10.0, corresponding to approximately 10 ring(s) or double-bond equivalent(s). With a molecular weight of 481.67 g/mol, it falls into the moderately-high-molecular-weight range. 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 | C30H43NO4 |
| Molecular Weight | 481.67 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) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Nitrogen Atoms | 1 |
Related Fesoterodine Standards
- Fesoterodine Impurity N17 (CAS 1254942-29-4)
- Fesoterodine Impurity 19 (CAS CATO-C4X-164419)
- Fesoterodine Impurity 7 (CAS 1428856-47-6)
- Fesoterodine Fumarate (CAS 286930-03-8)
- Fesoterodine Impurity 14 (CAS 1262778-55-1)
- Fesoterodine Impurity 21 (CAS 1391913-28-2)
- Fesoterodine Impurity 10 (CAS CATO-C4X-164410)
- Fesoterodine Impurity 9 (CAS CATO-C4X-16449)
Recommended Standards
- N,4-Bis(1-phenylethyl)-N-(4-(1-phenylethyl)phenyl)aniline (CAS 93920-04-8)
- Fexofenadine Impurity 23 (CAS 1208313-13-6)
- [S(R)]-N-[(S)-[2-(Di-tert-butylphosphino)phenyl[(2-naphthalenyl)methyl]-2-methyl-2-propanesulfinamide (CAS 2565792-62-1)
- Fexofenadine Impurity 41 (CAS 1795786-25-2)
- Promethazine EP Impurity C (R-Isomer) (CAS CATO-C3D-262692)
- Dimetindene EP Impurity I (CAS 151562-10-6)
- Gadoteridol Impurity 44 (CAS CATO-C4X-225744)
- 188132-01-6 4-[Benzyl(methyl)amino]butanoic acid MFCD09704258 (CAS 188132-01-6)
- 4-(Morpholine-4-carbonyl)-1-phenylpyrrolidin-2-one (CAS 39629-99-7)
- Methylnaltrexone Bromide Impurity 13 (CAS CATO-C4X-152113)
- 3,6-Difluoro-2-iodobenzaldehyde (CAS 1208077-39-7)
- 4-Iodo-2,5-dimethylpyridine (CAS 1803819-50-2)
- 188781-15-9 Ethyl-2-trifluoromethyl-4-trifluoromethyl-5-pyrimidine carboxylate ethyl 2,4-bis(trifluoromethyl)pyrimidine-5-carboxylate (CAS 188781-15-9)
- Neuropeptide Y (3-36) (porcine) trifluoroacetate salt (CAS 143863-88-1)
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