Febuxostat Impurity 62 CAS 2476465-11-7
| CAS No. | 2476465-11-7 |
| Molecular Formula | C18H21NO5S |
| Molecular Weight | 363.43 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.
Febuxostat Impurity 62 (CAS 2476465-11-7) is a certified pharmaceutical impurity reference standard with the molecular formula C18H21NO5S and a molecular weight of 363.43 g/mol.
Owing to a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, Febuxostat Impurity 62 is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 363.43 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 | C18H21NO5S |
| Molecular Weight | 363.43 g/mol |
| Purity | >95% |
| Storage | Store at 2-8°C, 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) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2000 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Febuxostat Standards
- Febuxostat Impurity 58 (CAS 2095166-41-7)
- Febuxostat Impurity 15 (CAS 1271738-74-9)
- Febuxostat Impurity 73 (CAS 1346238-15-0)
- Febuxostat impurity 125 (CAS CATO-C4X-1162101)
- Febuxostat Impurity 109 (CAS CATO-C4X-1162109)
- Febuxostat Impurity 83 (CAS CATO-C4X-116283)
- Febuxostat Impurity 47 (CAS 1346238-10-5)
- Febuxostat Impurity 26 (CAS 2428631-67-6)
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