Febuxostat Impurity 84 CAS 2428631-65-4
| CAS No. | 2428631-65-4 |
| Molecular Formula | C17H15N3O3S |
| Molecular Weight | 341.38 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Febuxostat Impurity 84 (CAS 2428631-65-4) is a certified pharmaceutical impurity reference standard with the molecular formula C17H15N3O3S and a molecular weight of 341.38 g/mol.
The molecular framework of Febuxostat Impurity 84 (C17H15N3O3S) is characterized by a steroid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.
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 | C17H15N3O3S |
| Molecular Weight | 341.38 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) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2000 |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Febuxostat Standards
- Febuxostat Impurity 13 (CAS 160844-75-7)
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Recommended Standards
- Etoricoxib Impurity 84 (CAS CATO-C4X-108084)
- Picosulfate impurity 21 (CAS CATO-C4X-123721)
- Etoricoxib Impurity 81 (CAS 2241145-66-2)
- Fudosteine Impurity 86 (CAS CATO-C4X-144786)
- Ketoprofen Impurity 36 (CAS 872091-00-4)
- Ranitidine EP Impurity D (CAS 117846-02-3)
- Vonoprazan Impurity 112 (CAS 881673-95-6)
- (E)-N-(naphthalen-1-yl)-1-(4-nitrophenyl)methanimine (CAS 967-13-5)
- Pimavanserin Impurity 67 (CAS CATO-C4X-193867)
- 1H-1,2,3-Triazole-1-carbaldehyde (CAS 959960-46-4)
- ethyl 9-ethyl-1-(hydroxymethyl)pyrido[3,4-b]indole-3-carboxylate (CAS 2668259-72-9)
- Ethyl (R)-2-amino-3-mercapto-3-methylbutanoate (CAS 93700-41-5)
- 6-Amino-1-(pyridin-4-ylmethyl)pyrimidine-2,4(1H,3H)-dione (CAS 179486-52-3)
- Peptide Impurity 27 (CAS 1350456-68-6)
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