Febuxostat Impurity 13 CAS 160844-75-7
| CAS No. | 160844-75-7 |
| Molecular Formula | C18H20N2O3S |
| Molecular Weight | 344.43 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Febuxostat Impurity 13 (CAS 160844-75-7), a pharmacopoeial impurity reference standard (molecular formula C18H20N2O3S, MW 344.43 g/mol) used for the identification and quantification of trace impurities in APIs.
Structurally, Febuxostat Impurity 13 (C18H20N2O3S) contains a steroid core, an amide group, a sulfone 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 344.43 g/mol, it falls into the moderately-high-molecular-weight range. 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.
As a certified reference material (CRM), Febuxostat Impurity 13 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.
Physical & Chemical Properties
| Molecular Formula | C18H20N2O3S |
| Molecular Weight | 344.43 g/mol |
| Purity | >95% |
| 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) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2002 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Febuxostat Standards
- Febuxostat Impurity 53 (CAS 2230270-05-8)
- Febuxostat Impurity 54 (CAS 2375033-35-3)
- Febuxostat Impurity 55 (CAS CATO-C4X-116255)
- Febuxostat impurity 91 (CAS 1380049-42-2)
- Febuxostat Impurity 99 (CAS CATO-C4X-116299)
- Febuxostat Impurity 43 (CAS 161798-03-4)
- Febuxostat Impurity 60 (CAS 2230270-03-6)
- Febuxostat Impurity 81 (CAS 2375033-31-9)
Recommended Standards
- Amisulpride Impurity 56 (CAS CATO-C4X-104556)
- Amisulpride Impurity 33 (CAS CATO-C4X-104533)
- Tert-butyl 4-(5-cyanobenzo[d]thiazol-2-yl)piperazine-1-carboxylate (CAS 2231676-60-9)
- Tert-butyl ((1R,2S)-1-(((1-methylcyclopropyl)sulfonyl)carbamoyl)-2-vinylcyclopropyl)carbamate (CAS 853269-57-5)
- Dobutamine Impurity 14 (CAS 61413-41-0)
- Sitafloxacin Impurity 33 (CAS CATO-C4X-115533)
- Macitentan Impurity 36 (CAS CATO-C4X-117536)
- tert-Butyl (5-formylpyridazin-3-yl)carbamate (CAS 2407462-02-4)
- 3-((2-Isopropyl-5-methylcyclohexyl)oxy)propane-1,2-diol (CAS 87061-04-9)
- 2H-Chromen-5-amine (CAS 170729-16-5)
- Ethyl (3R,4S)-1-benzyl-4-(4-(difluoromethoxy)phenyl)pyrrolidine-3-carboxylate (CAS 2322032-23-3)
- 5-Carbamoyl-1-(3,4-dimethylphenyl)-1H-pyrazole-4-carboxylic acid (CAS 103053-30-1)
- PBD-5,11-dione (CAS 18877-34-4)
- Semaglutide impurity 210 (CAS CATO-C4X-2226210)
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