3-(Chlorosulfonyl)-4-fluorobenzoyl chloride CAS 671-93-2
| CAS No. | 671-93-2 |
| Molecular Formula | C7H3Cl2FO3S |
| Molecular Weight | 257.07 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 3-(Chlorosulfonyl)-4-fluorobenzoyl chloride is closely related to a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, fluorine/chlorine substitution, an aromatic ring system in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
3-(Chlorosulfonyl)-4-fluorobenzoyl chloride (CAS 671-93-2) is a high-purity analytical reference standard with the molecular formula C7H3Cl2FO3S and a molecular weight of 257.07 g/mol.
Owing to a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, fluorine/chlorine substitution, an aromatic ring system, 3-(Chlorosulfonyl)-4-fluorobenzoyl chloride is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 257.07 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C7H3Cl2FO3S |
| Molecular Weight | 257.07 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) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Halogen Content | F/Cl-containing |
| Sulfur Atoms | 1 |
Related Chlorosulfonyl Standards
- Ethyl 4-(chlorosulfonyl)piperazine-1-carboxylate (CAS 105168-69-2)
- 3-chlorosulfonyl-4-methoxybenzoic acid (CAS 50803-29-7)
- methyl 4-[(chlorosulfonyl)methyl]oxane-4-carboxylate (CAS 374822-74-9)
- 3-(Chlorosulfonyl)-2,6-difluorobenzoic Acid (CAS 142576-91-8)
- 3-(Chlorosulfonyl)-2,5-difluorobenzoic acid (CAS 926223-16-7)
- 3-(Chlorosulfonyl)-4,5-difluorobenzoic acid (CAS 716361-76-1)
- 5-(Chlorosulfonyl)-2,3-difluorobenzoic acid (CAS 847972-30-9)
- 5-(Chlorosulfonyl)-2,4-difluorobenzoic acid (CAS 53916-70-4)
Recommended Standards
- 2-Iodo-1-methyl-1H-indole (CAS 75833-63-5)
- 3-Acetyl-6,8-dichloro-2H-1-benzopyran-2-one (CAS 2199-91-9)
- 2-Bromo-6-(difluoromethyl)naphthalene (CAS 627526-96-9)
- 3-Iodo-1-methyl-1H-indole (CAS 85092-84-8)
- 1-(3-Chlorophenyl)cyclobutanemethanamine (CAS 115816-34-7)
- 4-Cyclohexylcyclohexanone (CAS 92-68-2)
- Tert-butyl 3-(oxazol-5-yl)piperidine-1-carboxylate (CAS 1696272-40-8)
- 3-Bromo-5-(4-chlorophenyl)pyridine (CAS 675590-22-4)
- Methyl 2-(5-bromo-4-chloro-2-nitrophenyl)acetate (CAS 1820703-56-7)
- 5-(P-tolyloxy)pentanoic acid (CAS 89326-73-8)
- (2R)-2-[(4R)-4,5-Dihydro-4-(1-methylethyl)-2-oxazolyl]-1-(diphenylphosphino)piperidine (CAS 2757084-62-9)
- Methyl 3-chloro-6-methylpicolinate (CAS 894074-83-0)
- (1R,5S)-8-azabicyclo[3.2.1]Octan-3-amine (CAS 196614-15-0)
- Semaglutide Impurity 4 (CAS CATO-C4X-22264)
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