2-(Difluoromethoxy)-5-fluorobenzenesulfonamide CAS 1261839-91-1
| CAS No. | 1261839-91-1 |
| Molecular Formula | C7H6F3NO3S |
| Molecular Weight | 241.19 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C7H6F3NO3S, 2-(Difluoromethoxy)-5-fluorobenzenesulfonamide contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, fluorine substitution, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 241.19 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).
2-(Difluoromethoxy)-5-fluorobenzenesulfonamide (CAS 1261839-91-1), molecular formula C7H6F3NO3S and molecular weight 241.19 g/mol, is a CATO reference standard with documented purity and traceability.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C7H6F3NO3S |
| Molecular Weight | 241.19 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1990 |
| Halogen Content | F-containing |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Difluoromethoxy Standards
- 4-(Difluoromethoxy)-2-fluorobenzenesulfonamide (CAS 1261478-33-4)
- 2-(Difluoromethoxy)-3-fluorobenzene-1-sulfonamide (CAS 1261567-66-1)
- 4-(Difluoromethoxy)-3-fluorobenzenesulfonamide (CAS 1261645-38-8)
- 2-(Difluoromethoxy)-4-fluorobenzenesulfonamide (CAS 1261677-84-2)
- 3-(Difluoromethoxy)-5-fluorobenzene-1-sulfonamide (CAS 1261738-66-2)
- (3-(2-(Difluoromethoxy)phenyl)-1,2,4-oxadiazol-5-yl)methanamine (CAS 1707584-72-2)
- Methyl 4-(difluoromethoxy)-1h-indole-2-carboxylate (CAS 926219-45-6)
- (2E)-1-[3-(Difluoromethoxy)phenyl]-3-(dimethylamino)prop-2-en-1-one (CAS 832741-15-8)
Recommended Standards
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- 4-((3-Acetamidophenyl)amino)-4-oxobutanoic acid (CAS 722466-08-2)
- (2-chlorophenyl)(2,4-dimethylphenyl)methanamine hydrochloride (CAS 1333708-30-7)
- 3-(3-(4-Chlorophenyl)-1,2,4-oxadiazol-5-yl)propan-1-amine hydrochloride (CAS 1374407-72-3)
- 7-Amino-2-ethyl-4-(4-fluorobenzyl)-2H-benzo[b][1,4]oxazin-3(4H)-one (CAS 1018509-50-6)
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- 6-Ethylpicolinimidamide hydrochloride (CAS 112736-14-8)
- Allo-Thr7-Tirzepatide (CAS CATO-CPTD788933)
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