Belzutifan Impurity 3 CAS CATO-C4X-33943
| CAS No. | CATO-C4X-33943 |
| Molecular Formula | C17H13F2NO5S |
| Molecular Weight | 381.35 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.
CATO supplies Belzutifan Impurity 3 (CAS CATO-C4X-33943), a pharmacopoeial impurity reference standard (molecular formula C17H13F2NO5S, MW 381.35 g/mol) used for the identification and quantification of trace impurities in APIs.
Based on its molecular formula C17H13F2NO5S, Belzutifan Impurity 3 contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, fluorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 381.35 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).
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 | C17H13F2NO5S |
| Molecular Weight | 381.35 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | F-containing |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
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- 4-((4,4-Dimethylpiperidin-1-yl)methyl)-2-methoxybenzoic acid (CAS 1975504-53-0)
- Methyl 1-(tetrahydrofuran-2-carbonyl)piperidine-4-carboxylate (CAS 600159-85-1)
- 1-Benzyl-4-fluoro-1h-indole-2-carboxylic acid (CAS 1240567-77-4)
- (4-Chloro-3-fluoro-5-methylfuran-2-yl)(phenyl)methanol (CAS 1443324-44-4)
- n-(4-Acetylthiazol-2-yl)furan-2-carboxamide (CAS 1015656-78-6)
- Semaglutide Impurity 13 (CAS CATO-C4X-222613)
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