Febuxostat Impurity 15 CAS 1271738-74-9
| CAS No. | 1271738-74-9 |
| Molecular Formula | C18H22N2O4S |
| Molecular Weight | 362.44 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Febuxostat Impurity 15 meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
CATO supplies Febuxostat Impurity 15 (CAS 1271738-74-9), a pharmacopoeial impurity reference standard (molecular formula C18H22N2O4S, MW 362.44 g/mol) used for the identification and quantification of trace impurities in APIs.
Based on its molecular formula C18H22N2O4S, Febuxostat Impurity 15 contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 362.44 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.
Physical & Chemical Properties
| Molecular Formula | C18H22N2O4S |
| Molecular Weight | 362.44 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1990 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Febuxostat Standards
- Febuxostat Impurity 73 (CAS 1346238-15-0)
- Febuxostat Impurity 58 (CAS 2095166-41-7)
- Febuxostat Impurity 62 (CAS 2476465-11-7)
- 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)
Recommended Standards
- Revaprazan (CAS 199463-33-7)
- N'-[(1E)-(4-Methoxyphenyl)methylidene]-4H,5H-naphtho[1,2-b]thiophene-2-carbohydrazide (CAS 278782-23-3)
- Dexamethasone Impurity 33 (CAS 75262-69-0)
- N-(4-(N-Cyclohexyl-N-methylsulfamoyl)phenyl)furan-2-carboxamide (CAS 713507-02-9)
- Bromfenac Impurity 47 (CAS 241825-87-6)
- Roxadustat Impurity 128 (CAS CATO-C4X-2213128)
- Rivaroxaban Impurity 32 (CAS 438056-69-0)
- 8-Methoxy-2-oxo-2H-chromene-3-carbonitrile (CAS 13229-91-9)
- 3-(Benzyloxy)-5-hydroxybenzyl Alcohol (CAS 134868-93-2)
- (3-Aminophenyl)(azepan-1-yl)methanone (CAS 401646-91-1)
- 1,2-Diazinane-3-carboxylic acid tosylate (CAS 2379651-43-9)
- (3E)-1-(4-Bromophenyl)-3-{[(2,4-dichlorophenyl)methoxy]imino}propan-1-one (CAS 338976-49-1)
- Pitavastatin Impurity 118 (CAS CATO-C4X-1037118)
- Galanin-Like Peptide (rat) trifluoroacetate salt (CAS 245114-97-0)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com