(4E)-4-[(5-Bromo-2-furyl)methylene]-3-(chloromethyl)isoxazol-5(4H)-one 1142199-66-3 CAS 1142199-66-3
| CAS No. | 1142199-66-3 |
| Molecular Formula | C9H5BrClNO3 |
| Molecular Weight | 290.50 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 290.50 g/mol gives (4E)-4-[(5-Bromo-2-furyl)methylene]-3-(chloromethyl)isoxazol-5(4H)-one 1142199-66-3 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
(4E)-4-[(5-Bromo-2-furyl)methylene]-3-(chloromethyl)isoxazol-5(4H)-one 1142199-66-3 (CAS 1142199-66-3) is a high-purity analytical reference standard with the molecular formula C9H5BrClNO3 and a molecular weight of 290.50 g/mol.
The molecular framework of (4E)-4-[(5-Bromo-2-furyl)methylene]-3-(chloromethyl)isoxazol-5(4H)-one 1142199-66-3 (C9H5BrClNO3) is characterized by a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, chlorine/bromine substitution. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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.
As a certified reference material (CRM), (4E)-4-[(5-Bromo-2-furyl)methylene]-3-(chloromethyl)isoxazol-5(4H)-one 1142199-66-3 meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C9H5BrClNO3 |
| Molecular Weight | 290.50 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 sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1989 |
| Halogen Content | Cl/Br-containing |
| Nitrogen Atoms | 1 |
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