Vilanterol Impurity 15 CAS 208925-08-0
| CAS No. | 208925-08-0 |
| Molecular Formula | C12H17NO3 |
| Molecular Weight | 223.27 g/mol |
| 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.
Vilanterol Impurity 15 (CAS 208925-08-0) is a certified pharmaceutical impurity reference standard with the molecular formula C12H17NO3 and a molecular weight of 223.27 g/mol.
Vilanterol Impurity 15 (C12H17NO3) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, 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 high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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 | C12H17NO3 |
| Molecular Weight | 223.27 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | >95% |
| Storage | Store at 2-8°C, 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; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2016 |
| Nitrogen Atoms | 1 |
Related Vilanterol Standards
- Vilanterol Impurity 35 (CAS 85309-91-7)
- Vilanterol Impurity 81 (CAS CATO-C4X-193581)
- Vilanterol Impurity 82 (CAS CATO-C4X-193582)
- Vilanterol Impurity 45 (CAS CATO-C4X-193545)
- Vilanterol Impurity 79 (CAS CATO-C4X-193579)
- Vilanterol Impurity 1 (CAS CATO-C4X-19351)
- Vilanterol Impurity 2 (CAS CATO-C4X-19352)
- Vilanterol Impurity 3 (CAS 452340-96-4)
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- 3-Hydroxy-4-methanesulfonyl-1lambda6-thiolane-1,1-dione, mixture of diastereomers (CAS 53287-33-5)
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