5-Isothiazolecarbonyl chloride CAS 3683-97-4
| CAS No. | 3683-97-4 |
| Molecular Formula | C4H2ClNOS |
| Molecular Weight | 147.58 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
5-Isothiazolecarbonyl chloride (CAS 3683-97-4) is a high-purity analytical reference standard with the molecular formula C4H2ClNOS and a molecular weight of 147.58 g/mol.
Owing to an amide group, sulfur-containing functionality, a hydroxyl group, an ether linkage, chlorine substitution, 5-Isothiazolecarbonyl chloride is typically off-white to pale yellow liquid. Its solid-state physicochemical attributes — including a molecular weight of 147.58 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
CATO manufactures 5-Isothiazolecarbonyl chloride under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C4H2ClNOS |
| Molecular Weight | 147.58 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 |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1958 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Recommended Standards
- 5-Chlorothiazole-2-carbaldehyde (CAS 59129-52-1)
- Thiazole-5-carbonyl chloride (CAS 41125-73-9)
- 4-Chlorothiazole-2-carbaldehyde (CAS 466686-79-3)
- 2-Chloropyridine-4-carboxaldehyde (CAS 101066-61-9)
- ethyl 2,2-dibromo-1-phenylcyclopropane-1-carboxylate (CAS 65655-78-9)
- 3-Ethyl-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazol-6-amine (CAS 3176-52-1)
- 1-(2-Chloro-4-fluorophenyl)-2-methylpropan-2-ol (CAS 868049-98-3)
- 8-Iodo-2,3-dihydro-[1,4]dioxino[2,3-b]pyridine (CAS 1228666-17-8)
- methyl cis-4-aminocyclohexanecarboxylate hydrochloride (CAS 61367-16-6)
- Tert-butyl 4-amino-3-methoxybenzoate (CAS 123330-92-7)
- 5-(3-Methoxyphenyl)-1H-pyrazole-3-carbaldehyde (CAS 1257864-16-6)
- 3-Amino-6-chloro-2-methylisonicotinic acid (CAS 1073182-66-7)
- 2-(2,3-Dichlorophenyl)pyrrolidine (CAS 383127-30-8)
- Endo-Pro36-Tirzepatide (CAS CATO-CPTD788688)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com