3-Chloro-4-cyanobenzenesulfonyl chloride CAS 213130-43-9
| CAS No. | 213130-43-9 |
| Molecular Formula | C7H3Cl2NO2S |
| Molecular Weight | 236.08 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-Chloro-4-cyanobenzenesulfonyl chloride (CAS 213130-43-9), a certified reference material (molecular formula C7H3Cl2NO2S, MW 236.08 g/mol) for analytical method development and quality control.
The molecular framework of 3-Chloro-4-cyanobenzenesulfonyl chloride (C7H3Cl2NO2S) is characterized by an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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 | C7H3Cl2NO2S |
| Molecular Weight | 236.08 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2017 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Chloro Standards
- 2-Chloro-6-cyanobenzene-1-sulfonyl chloride (CAS 1261499-21-1)
- 2-Chloro-3-cyanobenzene-1-sulfonyl chloride (CAS 1261851-22-2)
- 2-Chloro-4-cyanobenzenesulfonyl Chloride (CAS 254749-11-6)
- 2-Chloro-5-cyanobenzenesulfonyl Chloride (CAS 942199-56-6)
- 3-Chloro-2-cyanobenzene-1-sulfonyl chloride (CAS 80023-25-2)
- 4-Chloro-3-cyanobenzene-1-sulfonyl chloride (CAS 56044-25-8)
- 5-Chloro-2-cyanobenzenesulfonyl Chloride (CAS 411210-92-9)
- 2-Chloro-n-(5-chloro-2-fluorophenyl)propanamide (CAS 1098361-04-6)
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