3-(Difluoromethoxy)-4-fluorobenzenesulfonyl chloride CAS 1261738-71-9
| CAS No. | 1261738-71-9 |
| Molecular Formula | C7H4ClF3O3S |
| Molecular Weight | 260.62 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
CATO supplies 3-(Difluoromethoxy)-4-fluorobenzenesulfonyl chloride (CAS 1261738-71-9), a certified reference material (molecular formula C7H4ClF3O3S, MW 260.62 g/mol) for analytical method development and quality control.
3-(Difluoromethoxy)-4-fluorobenzenesulfonyl chloride (C7H4ClF3O3S) contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, fluorine/chlorine substitution, an aromatic ring system. It is notably hygroscopic, halogen substitution raises its density and boiling point, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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).
CATO manufactures 3-(Difluoromethoxy)-4-fluorobenzenesulfonyl chloride under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C7H4ClF3O3S |
| Molecular Weight | 260.62 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), 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; 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/Cl-containing |
| Sulfur Atoms | 1 |
Related Difluoromethoxy Standards
- 4-(Difluoromethoxy)-3-fluorobenzene-1-sulfonyl chloride (CAS 1178111-39-1)
- 2-(Difluoromethoxy)-4-fluorobenzenesulfonyl chloride (CAS 1261453-16-0)
- 3-(Difluoromethoxy)-2-fluorobenzene-1-sulfonyl chloride (CAS 1261677-89-7)
- 2-(Difluoromethoxy)-3-fluorobenzene-1-sulfonyl chloride (CAS 1261760-49-9)
- 3-(Difluoromethoxy)-5-fluorobenzene-1-sulfonyl chloride (CAS 1261776-35-5)
- 4-(Difluoromethoxy)-2-fluorobenzene-1-sulfonyl chloride (CAS 1261825-39-1)
- 2-(difluoromethoxy)-5-fluorobenzene-1-sulfonyl chloride (CAS 1261862-25-2)
- 3-(Difluoromethoxy)-5-(1H-pyrazol-1-yl)thiophene-2-carboxylic acid (CAS 1710202-46-2)
Recommended Standards
- 2-Hydroxy-6-(trifluoromethyl)benzene-1-sulfonyl chloride (CAS 1261752-22-0)
- 2-Hydroxy-3-(trifluoromethyl)benzene-1-sulfonyl chloride (CAS 1261649-16-4)
- 2-Hydroxy-4-(trifluoromethyl)benzenesulfonyl ChlorideDISCONTINUED (CAS 1261646-63-2)
- 2-hydroxy-5-(trifluoromethyl)benzene-1-sulfonyl chloride (CAS 1261500-74-6)
- 2-(Aminomethyl)-4-(difluoromethyl)-6-iodopyridine-3-methanol (CAS 1805197-05-0)
- (4-phenylmorpholin-2-yl)methanol (CAS 67592-62-5)
- 4-Methyl-5-[3-phenyl-6-(trifluoromethyl)thieno[3,2-b]pyridin-2-yl]-4H-1,2,4-triazole-3-thiol (CAS 478048-39-4)
- 2-(4-Aminopiperazin-1-yl)acetic acid (CAS 164785-11-9)
- 3-[5-(Hydroxymethyl)-2-pyridyl]benzonitrile (CAS 887974-34-7)
- 2-Chloro-4-methoxyphenyl 3-piperidinyl etherhydrochloride (CAS 1220018-89-2)
- Tert-butyl 4-(piperidine-2-carbonyl)piperazine-1-carboxylate (CAS 873315-18-5)
- 2-(Methylamino)-1H-benzo[d]imidazole-6-carboxylic acid (CAS 1368310-81-9)
- Benzyl 2,5-dioxo-2,5-dihydro-1H-pyrrole-1-carboxylate (CAS 55750-51-1)
- Semaglutide Impurity 183 (CAS 159541-28-3)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
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