4-Bromo-3-chlorobenzo[d]isoxazole CAS 1260751-76-5
| CAS No. | 1260751-76-5 |
| Molecular Formula | C7H3BrClNO |
| Molecular Weight | 232.46 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
4-Bromo-3-chlorobenzo[d]isoxazole (CAS 1260751-76-5) is a high-purity analytical reference standard with the molecular formula C7H3BrClNO and a molecular weight of 232.46 g/mol.
Based on its molecular formula C7H3BrClNO, 4-Bromo-3-chlorobenzo[d]isoxazole contains an amide group, a hydroxyl group, an ether linkage, chlorine/bromine substitution, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 232.46 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.
Physical & Chemical Properties
| Molecular Formula | C7H3BrClNO |
| Molecular Weight | 232.46 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor, low volatility) |
| 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 | Cl/Br-containing |
| Nitrogen Atoms | 1 |
Related Bromo Standards
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Recommended Standards
- 7-Bromo-3-chlorobenzo[d]isoxazole (CAS 1260677-07-3)
- 5-Bromo-3-chloro-2-hydroxybenzonitrile (CAS 1260810-06-7)
- 6-Bromo-2-chlorobenzoxazole (CAS 1260643-15-9)
- 7-Bromo-5-chlorobenzo[d]isoxazole (CAS 1260903-12-5)
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- (4-Chloro-3-(difluoromethyl)-6-methylpyridin-2-yl)methanol (CAS 1806033-17-9)
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- (2Z)-3-(2-{[(4-chlorophenyl)methyl]sulfanyl}quinolin-3-yl)-2-phenylprop-2-enenitrile (CAS 478065-17-7)
- Azalanstat Impurity 1 (CAS CATO-C4X-35611)
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