Febuxostat Impurity 81 CAS 2375033-31-9
Purity >95%In StockPharmacopoeial Impurity Standards
| CAS No. | 2375033-31-9 |
| Molecular Formula | C18H21NO4S |
| Molecular Weight | 347.43 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
High-purity Febuxostat Impurity 81 (CAS 2375033-31-9) pharmacopoeial impurity standards reference standard. Molecular formula: C18H21NO4S. Molecular weight: 347.43 g/mol. Produced by CATO, one of China's leading reference material manufacturers, with COA documentation and global shipping.
Physical & Chemical Properties
| Molecular Formula | C18H21NO4S |
| Molecular Weight | 347.43 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.) | 1999 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Febuxostat Standards
- Febuxostat Impurity 43 (CAS 161798-03-4)
- Febuxostat Impurity 60 (CAS 2230270-03-6)
- Febuxostat Impurity 89 (CAS CATO-C4X-116289)
- Febuxostat Impurity 99 (CAS CATO-C4X-116299)
- Febuxostat impurity 91 (CAS 1380049-42-2)
- Febuxostat Impurity 65 (CAS CATO-C4X-116265)
- Febuxostat Impurity 63 (CAS CATO-C4X-116263)
- Febuxostat Impurity 13 (CAS 160844-75-7)
Recommended Standards
- Flurbiprofen Impurity 94 (CAS 121734-75-6)
- Propan-2-yl 3-{3-amino-6-methyl-5H,6H,7H,8H-thieno[2,3-b]1,6-naphthyridin-2-yl}-3-oxopropanoate (CAS 625371-50-8)
- Fluvastatin Impurity 17 (CAS CATO-C4X-165117)
- Letrozole Impurity 25 (CAS 1250126-45-4)
- Indocyanine Green Impurity 33 (CAS CATO-C4X-250333)
- Methyl 3-hydroxy-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzoate (CAS 2026647-81-2)
- Podophyllotoxin impurity 5 (CAS 1174-97-6)
- 4-(4-Fluorophenyl)-1,2,5-oxadiazol-3-amine (CAS 99817-27-3)
- Cholesterol Impurity 37 (CAS 7591-17-5)
- Semaglutide impurity 96 (CAS CATO-C4X-222696)
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 13829788188 / jacky.chen@cato-chem.com