3-Chlorobenzo[c]isothiazole CAS 34231-96-4
| CAS No. | 34231-96-4 |
| Molecular Formula | C7H4ClNS |
| Molecular Weight | 169.63 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
3-Chlorobenzo[c]isothiazole (CAS 34231-96-4), molecular formula C7H4ClNS and molecular weight 169.63 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C7H4ClNS, 3-Chlorobenzo[c]isothiazole contains a nitrile group, sulfur-containing functionality, chlorine substitution, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 169.63 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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.
As a certified reference material (CRM), 3-Chlorobenzo[c]isothiazole 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 | C7H4ClNS |
| Molecular Weight | 169.63 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 |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1966 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Chlorobenzo Standards
- 4-Chlorobenzo[d]isothiazole (CAS 25380-61-4)
- 5-Chlorobenzo[c]isothiazole (CAS 20712-05-4)
- 5-Chlorobenzo[d]isothiazole (CAS 41918-07-4)
- 6-Chlorobenzo[d]isothiazole (CAS 89583-89-1)
- 6-Chlorobenzo[d]thiazole (CAS 2942-10-1)
- 7-Chlorobenzo[d]isothiazole (CAS 89583-90-4)
- 7-Chlorobenzo[d]thiazole (CAS 2942-09-8)
- 3-Chlorobenzo[d]isoxazol-7-ol (CAS 155645-24-2)
Recommended Standards
- 3-Chloro-5-mercaptobenzonitrile (CAS 895572-41-5)
- 3-Chlorophenyl Isothiocyanate (CAS 2392-68-9)
- 3-Chloro-4-sulfanylbenzonitrile (CAS 38234-93-4)
- 3-Chlorothieno[2,3-b]pyridine (CAS 53399-36-3)
- N-(2-Aminopyrimidin-5-yl)-2-methyl-5-nitrobenzamide (CAS 925896-84-0)
- 3,3-Dimethyl-1-oxo-3,4-dihydro-1H-2-benzopyran-4-carboxylic acid (CAS 255841-48-6)
- n-(Pyridin-2-ylmethyl)-2-(pyrrolidin-1-yl)ethan-1-amine (CAS 163165-83-1)
- 4-Cyano-3-(difluoromethyl)-5-methylpyridine-2-carbonyl chloride (CAS 1806955-30-5)
- 6-(4-Chlorophenyl)-2-(naphthalen-2-yloxy)-4-(trifluoromethyl)pyridine-3-carbonitrile (CAS 338963-46-5)
- 2-{[(2-chlorophenyl)methyl]sulfanyl}-4-methyl-5H,6H,7H-cyclopenta[d]pyrimidine (CAS 477852-03-2)
- 4-[(Pyridin-2-yl)methyl]piperidin-4-ol (CAS 1083299-73-3)
- 3-(Pyridin-3-yl)-2-tosylacrylonitrile (CAS 897296-66-1)
- Methyl 2-(4-cyano-2-nitrophenoxy)acetate (CAS 652997-70-1)
- Liraglutide Impurity 16 TFA Salt (CAS CATO-C4X-199216)
Why CATO?
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