5-Chlorobenzo[c]isothiazole CAS 20712-05-4
| CAS No. | 20712-05-4 |
| Molecular Formula | C7H4ClNS |
| Molecular Weight | 169.63 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Structurally, 5-Chlorobenzo[c]isothiazole (C7H4ClNS) contains a nitrile group, sulfur-containing functionality, chlorine substitution, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 6.0, corresponding to approximately 6 ring(s) or double-bond equivalent(s). With a molecular weight of 169.63 g/mol, it falls into the medium-molecular-weight range. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
CATO supplies 5-Chlorobenzo[c]isothiazole (CAS 20712-05-4), a certified reference material (molecular formula C7H4ClNS, MW 169.63 g/mol) for analytical method development and quality control.
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
CATO manufactures 5-Chlorobenzo[c]isothiazole 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 | 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.) | 1962 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Chlorobenzo Standards
- 3-Chlorobenzo[c]isothiazole (CAS 34231-96-4)
- 4-Chlorobenzo[d]isothiazole (CAS 25380-61-4)
- 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
- 5-Chloro-2-sulfanylbenzonitrile (CAS 38244-31-4)
- 4-Chlorothieno[2,3-c]pyridine (CAS 477874-92-3)
- 5-Chlorobenzothiazole (CAS 2786-51-8)
- 4-Chlorobenzothiazole (CAS 3048-45-1)
- (R)-3-Acetoxyquinuclidine (CAS 59653-40-6 (free base))
- N'-(4-Fluorobenzo[d]thiazol-2-yl)-4-methoxybenzohydrazide (CAS 851978-72-8)
- 1H-Thieno[3,2-c][1,2]thiazin-4(3H)-one 2,2-dioxide (CAS 1710195-44-0)
- Nefopam impurity 18 (CAS CATO-C4X-283718)
- 2-methyl-1H,4H-pyrazolo[1,5-a][1,3,5]triazin-4-one (CAS 55457-17-5)
- 1,2,3,4-Tetra-O-acetyl-6-azido-6-deoxy-a-D-glucopyranose (CAS 51642-43-4)
- 5-Hydroxy-4-(thiophen-3-yl)isoquinolin-1(2H)-one (CAS 656234-37-6)
- N,N-Dimethyl-3,6-diphenyl-1,2,4-triazin-5-amine (CAS 339013-08-0)
- 6-Bromo-3-chloro-4-pyridazinecarboxylic acid (CAS 1500866-49-8)
- Semaglutide Impurity 121 X Sodium Salt (CAS CATO-C4X-2226121)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
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- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com