4-(chlorosulfonyl)-2-fluorobenzoic acid CAS 1354962-26-7
| CAS No. | 1354962-26-7 |
| Molecular Formula | C7H10ClFO4S |
| Molecular Weight | 244.67 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 4-(chlorosulfonyl)-2-fluorobenzoic acid is closely related to a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, fluorine/chlorine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
4-(chlorosulfonyl)-2-fluorobenzoic acid (CAS 1354962-26-7), molecular formula C7H10ClFO4S and molecular weight 244.67 g/mol, is a CATO reference standard with documented purity and traceability.
4-(chlorosulfonyl)-2-fluorobenzoic acid (C7H10ClFO4S) contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, fluorine/chlorine substitution. 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. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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 | C7H10ClFO4S |
| Molecular Weight | 244.67 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 | Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 2.0 |
| CAS Registry Year (est.) | 1991 |
| Halogen Content | F/Cl-containing |
| Sulfur Atoms | 1 |
Related chlorosulfonyl Standards
- 5-(Chlorosulfonyl) Isatin (CAS 132898-96-5)
- methyl 4-chlorosulfonyl-1-methyl-pyrazole-3-carboxylate (CAS 2228869-05-2)
- (E)-3-(4-(Chlorosulfonyl)phenyl)acrylic acid (CAS 155378-73-7)
- Methyl 1-(chlorosulfonyl)piperidine-2-carboxylate (CAS 1218185-19-3)
- 5-Chlorosulfonyl-4-methylisoquinoline (CAS 194032-16-1)
- methyl 1-(chlorosulfonyl)piperidine-4-carboxylate (CAS 923681-70-3)
- methyl 5-chlorosulfonyl-1-methyl-pyrrole-2-carboxylate (CAS 306936-53-8)
- Methyl 2-(chlorosulfonyl)thiazole-5-carboxylate (CAS 933685-92-8)
Recommended Standards
- N-[2-(2-Chloro-6-nitrophenoxy)ethyl]-N,N-dimethylamine (CAS 1353505-03-9)
- Ethyl 4-(chloromethyl)-2-(1-hydroxyethyl)pyrimidine-5-carboxylate (CAS 1355217-60-5)
- 2-Chloro-1-(dibenzo[b,d]furan-2-yl)ethanone (CAS 13067-90-8)
- Ethyl 4-chloro-2,5-dimethoxybenzoate (CAS 1369189-45-6)
- 2-Chloro-1-(2-ethylpiperidin-1-yl)ethan-1-one (CAS 76395-72-7)
- 2-Bromo-4,5,6-trifluorobenzothiazole (CAS 1080642-32-5)
- Butyl cyclopentanecarboxylate (CAS 99978-03-7)
- Decitabine Impurity 18 (CAS 178671-74-4)
- Labeolol hydrochloride (CAS 32780-64-6)
- 2,3,6-Trimethyl-5-nitro-1H-indole (CAS 289685-81-0)
- 6-(Tert-butoxycarbonyl)-6-azaspiro[2.6]Nonane-1-carboxylic acid (CAS 1373028-50-2)
- N-Methylpiperidine-3-sulfonamide hydrochloride (CAS 1923088-50-9)
- 2-Propoxypyridine (CAS 101870-22-8)
- Tirzepatide Impurity 44 (CAS CATO-C4X-324044)
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