Fesoterodine Impurity 12 CAS 1435768-96-9
| CAS No. | 1435768-96-9 |
| Molecular Formula | C26H35NO3 |
| Molecular Weight | 409.56 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Fesoterodine Impurity 12 (C26H35NO3) contains a steroid core, an amide group, a hydroxyl group, an ether linkage. Its high carbon-to-hydrogen ratio confers good lipid solubility, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
As a process- or degradation-related impurity, Fesoterodine Impurity 12 (CAS 1435768-96-9, C26H35NO3) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
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.
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 | C26H35NO3 |
| Molecular Weight | 409.56 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) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1991 |
| Nitrogen Atoms | 1 |
Related Fesoterodine Standards
- Fesoterodine Impurity 13 (CAS 1333234-71-1)
- (S)-Fesoterodine Hydrochloride (CAS 1294517-14-8)
- Fesoterodine Impurity 1 (CAS 250214-44-9)
- Fesoterodine Impurity 2 (CAS 1431511-18-0)
- Fesoterodine Impurity 5 (CAS 1208313-12-5)
- Fesoterodine Impurity 10 (CAS CATO-C4X-164410)
- Fesoterodine Impurity 9 (CAS CATO-C4X-16449)
- Fesoterodine Impurity 11 (CAS CATO-C4X-164411)
Recommended Standards
- Bosentan Impurity 14 (CAS 1355251-10-3)
- Lincomycin-d3 (CAS CATO-C4X-134215)
- Fexofenadine Impurity 40 (CAS 1390644-37-7)
- Ibuprofen Impurity 156 (CAS CATO-C4X-1082156)
- Pemafibrate Impurity 29 (CAS CATO-C4X-290329)
- Valganciclovir Hydrochloride EP Impurity C (CAS 1202645-50-8)
- Losartan Impurity 45 (CAS 141949-90-8)
- 2-(Aminomethyl)pyrimidine-5-carbonitrile hydrochloride (CAS 1955499-82-7)
- 7-Fluoro-5-oxa-2-azaspiro[3.5]nonane hydrochloride (CAS 2403799-82-4)
- 1-Bromo-2,4-difluoro-5-methoxybenzene (CAS 943831-06-9)
- 1-(3-Chloro-5-(trifluoromethyl)pyridin-2-yl)-3-cyclopropylpropane-1,3-dione (CAS 172527-65-0)
- Bilastine impurity 118 (CAS 1178710-88-7（free base）)
- Bimatoprost Impurity 24 (CAS CATO-C4X-196424)
- His-Cyclic-Semaglutide (CAS CATO-C4X-2226182)
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