4-Fluorobenzo[d]isoxazole CAS 1260751-84-5
| CAS No. | 1260751-84-5 |
| Molecular Formula | C7H4FNO |
| Molecular Weight | 137.11 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 4-Fluorobenzo[d]isoxazole.
4-Fluorobenzo[d]isoxazole (CAS 1260751-84-5) is a high-purity analytical reference standard with the molecular formula C7H4FNO and a molecular weight of 137.11 g/mol.
Owing to an amide group, a hydroxyl group, an ether linkage, fluorine substitution, an aromatic ring system, 4-Fluorobenzo[d]isoxazole is typically off-white to pale yellow liquid. Its solid-state physicochemical attributes — including a molecular weight of 137.11 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 4-Fluorobenzo[d]isoxazole 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 | C7H4FNO |
| Molecular Weight | 137.11 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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1990 |
| Halogen Content | F-containing |
| Nitrogen Atoms | 1 |
Related Fluorobenzo Standards
- 6-Fluorobenzo[d]isoxazole (CAS 1260799-05-0)
- 5-Fluorobenzo[d]isoxazole (CAS 735294-25-4)
- 5-Fluorobenzo[c][1,2,5]oxadiazole (CAS 149440-45-9)
- 5-Fluorobenzo[d][1,3]dioxole (CAS 147900-49-0)
- 7-Fluorobenzo[d]oxazol-5-amine (CAS 1268154-08-0)
- 6-Fluorobenzo[d]isoxazol-3-ylamine (CAS 177995-38-9)
- 2-Fluorobenzo[d]oxazol-4-amine (CAS 1806300-37-7)
- 4-Fluorobenzo[d]isoxazol-3-amine (CAS 904815-05-0)
Recommended Standards
- 5-Fluoro-1H-pyrazolo[4,3-β]pyridine (CAS 1260670-02-7)
- 5-Fluoro-1H-pyrazolo[3,4-c]pyridine (CAS 1260664-19-4)
- 7-Fluorobenzoxazole (CAS 1267061-18-6)
- 5-Amino-2-fluoronicotinonitrile (CAS 1260663-78-2)
- 3-Methyl-7-morpholino-6-nitroquinazolin-4(3H)-one (CAS 66234-56-8)
- 2-((6-Methoxydec-9-en-4-yn-1-yl)oxy)tetrahydro-2H-pyran (CAS 823792-11-6)
- Methyl 1-methyl-2-oxo-1,2-dihydropyridine-4-carboxylate (CAS 20845-23-2)
- 1094747-55-3 2-Chloro-N-(2,5-dimethoxyphenyl)-2-phenylacetamide MFCD13634278 (CAS 1094747-55-3)
- 1-[2-(4-bromobenzenesulfonyl)ethyl]piperidin-3-amine (CAS 1303755-33-0)
- 5-(2-Aminoethyl)-1-benzylpyrrolidin-2-one (CAS 1253654-23-7)
- 3-Hydroxy-DL-kynurenine (CAS 484-78-6)
- Paclobutrazol Impurity 8 (CAS 76714-88-0)
- 4-(3-Chloro-5-(trifluoromethyl)pyridin-2-yl)but-3-yn-2-ol (CAS 937601-45-1)
- [Formaldehyde Schiff-base]-Semaglutide Impurity 136 X TFA Salt (CAS CATO-C4X-2226136)
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