5-Fluorobenzo[d]isothiazole CAS 139037-02-8
| CAS No. | 139037-02-8 |
| Molecular Formula | C7H4FNS |
| Molecular Weight | 153.18 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
5-Fluorobenzo[d]isothiazole (C7H4FNS) contains a nitrile group, sulfur-containing functionality, fluorine substitution, an aromatic ring system. Halogen substitution raises its density and boiling point; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
5-Fluorobenzo[d]isothiazole (CAS 139037-02-8), molecular formula C7H4FNS and molecular weight 153.18 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.
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 | C7H4FNS |
| Molecular Weight | 153.18 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.) | 1996 |
| Halogen Content | F-containing |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Fluorobenzo Standards
- 6-Fluorobenzo[d]thiazole (CAS 118220-71-6)
- 7-Fluorobenzo[d]isothiazole (CAS 139036-98-9)
- 6-Fluorobenzo[d]isothiazole (CAS 139037-00-6)
- 5-Fluorobenzo[d]thiazole (CAS 1644-85-5)
- 7-Fluorobenzo[d]thiazole (CAS 214855-12-6)
- 6-Fluorobenzo[c]isoxazol-3(1H)-one (CAS 1260869-05-3)
- 7-Fluorobenzo[c]isoxazol-3(1H)-one (CAS 1781130-52-6)
- 4-Fluorobenzo[c]isoxazol-3(1H)-one (CAS 344779-33-5)
Recommended Standards
- (6,7-Dihydro-4H-pyrazolo[5,1-c][1,4]oxazin-3-yl)methanamine (CAS 1393532-45-0)
- 1-(2-Methylpropyl)-1h-1,2,3-triazole-4-carbaldehyde (CAS 1393539-81-5)
- 6-Ethoxypyridine-2,3-diamine (CAS 138650-06-3)
- 1-Isobutyl-1H-1,2,3-triazole-5-carbaldehyde (CAS 1393543-80-0)
- Bicyclo[3.1.0]hexan-3-ol (CAS 89489-26-9)
- 2-Difluoromethoxy-3-fluoro-4-formylpyridine (CAS 1803848-21-6)
- 4-Amino-3-(difluoromethyl)-5-hydroxypicolinamide (CAS 1805131-76-3)
- 4-Phenyl-3a,4,5,9b-tetrahydro-3H-cyclopenta[c]quinoline-6-carboxylic acid (CAS 353495-27-9)
- 5-(2,5-Dichlorophenyl)pyrimidin-2-amine (CAS 1111104-96-1)
- 4-Bromo-N-(3-methoxypropyl)-1h-pyrrole-2-carboxamide (CAS 1153795-13-1)
- 4-(3-Methoxypropoxy)piperidine (CAS 79025-24-4)
- 3-methoxycyclobutan-1-one (CAS 30830-25-2)
- Hydroxyhexamide (CAS 3168-01-2)
- Tirzepatide Impurity 24 X TFA Salt (CAS CATO-C4X-324024)
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