3-Chlorobenzoisothiazole 1,1-Dioxide CAS 567-19-1
| CAS No. | 567-19-1 |
| Molecular Formula | C7H4ClNO2S |
| Molecular Weight | 201.63 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The molecular framework of 3-Chlorobenzoisothiazole 1,1-Dioxide (C7H4ClNO2S) 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.
3-Chlorobenzoisothiazole 1,1-Dioxide (CAS 567-19-1), molecular formula C7H4ClNO2S and molecular weight 201.63 g/mol, is a CATO reference standard with documented purity and traceability.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), 3-Chlorobenzoisothiazole 1,1-Dioxide meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C7H4ClNO2S |
| Molecular Weight | 201.63 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.) | 1957 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Recommended Standards
- 3-Chloro-5H-pyridazino[3,4-b][1,4]thiazin-6(7H)-one (CAS 495415-02-6)
- 3-Chloro-n-(2-fluorophenyl)propanamide (CAS 349097-66-1)
- 3-Chloro-4H-thieno[3,2-b]pyrrole-5-carboxylic acid (CAS 332099-33-9)
- 3-Chloro-N-(4-fluorophenyl)propanamide (CAS 56767-37-4)
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