3,5-Difluoro-2-methoxybenzenesulfonyl chloride CAS 1233509-72-2
| CAS No. | 1233509-72-2 |
| Molecular Formula | C7H5ClF2O3S |
| Molecular Weight | 242.63 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 3,5-Difluoro-2-methoxybenzenesulfonyl chloride.
3,5-Difluoro-2-methoxybenzenesulfonyl chloride (CAS 1233509-72-2), molecular formula C7H5ClF2O3S and molecular weight 242.63 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C7H5ClF2O3S, 3,5-Difluoro-2-methoxybenzenesulfonyl chloride contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, fluorine/chlorine substitution, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 242.63 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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 | C7H5ClF2O3S |
| Molecular Weight | 242.63 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 Difluoro Standards
- 2,4-Difluoro-6-methoxybenzenesulfonyl chloride (CAS 1162257-25-1)
- 3,6-Difluoro-2-methoxybenzene-1-sulfonyl chloride (CAS 1162257-28-4)
- 3,5-Difluoro-4-methoxybenzenesulfonyl chloride (CAS 1178236-98-0)
- 2,6-Difluoro-4-methoxybenzenesulfonyl chloride (CAS 1178498-86-6)
- 2,3-Difluoro-6-methoxybenzenesulfonyl chloride (CAS 1208074-96-7)
- 2,5-Difluoro-4-methoxybenzene-1-sulfonyl chloride (CAS 1208075-47-1)
- 4,5-Difluoro-2-methoxybenzene-1-sulfonyl chloride (CAS 1261825-36-8)
- 2,3-Difluoro-4-methoxybenzene-1-sulfonyl chloride (CAS 1341660-99-8)
Recommended Standards
- 3-(2-Chloroethyl)-6-fluoroquinazoline-2,4(1H,3H)-dione (CAS 1246061-38-0)
- 5-(2-chloro-4-fluorophenyl)-5-methylimidazolidine-2,4-dione (CAS 1258650-66-6)
- 1-(2-Chloro-6-fluorophenyl)-3-oxocyclobutane-1-carboxylic acid (CAS 1342086-54-7)
- 1-(2-Chloro-4-fluorophenyl)-3-oxocyclobutane-1-carboxylic acid (CAS 1342971-33-8)
- 7-methyl-1,2-dihydroquinolin-2-one (CAS 4053-35-4)
- (S)-2-Amino-5-guanidino-N-hydroxypentanamide (CAS 25125-96-6)
- 6-chloro-1-(2,2-difluoropropyl)-1H-pyrazolo[3,4-d]pyrimidine (CAS 2923244-64-6)
- 2-[benzyl(methyl)amino]acetonitrile (CAS 14321-25-6)
- Methyl 4-chloro-3-fluoropicolinate (CAS 1034921-05-5)
- Allopurinol Impurity 7 (CAS 321571-07-7)
- 1-(Ethenesulfonyl)-2-(propane-1-sulfonyl)benzene (CAS 1155564-64-9)
- 1-(2,4-Difluorophenyl)-2,5-dimethyl-1h-pyrrole-3-carbaldehyde (CAS 125126-73-0)
- trans-2-Bromo-1-indanol (CAS 10368-44-2)
- Semaglutide impurity 48 (CAS CATO-C4X-222648)
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