Methyl 5-(2,4-Difluorophenyl)isoxazole-3-carboxylate CAS 1105191-49-8
| CAS No. | 1105191-49-8 |
| Molecular Formula | C11H7F2NO3 |
| Molecular Weight | 239.17 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Methyl 5-(2,4-Difluorophenyl)isoxazole-3-carboxylate (CAS 1105191-49-8), a certified reference material (molecular formula C11H7F2NO3, MW 239.17 g/mol) for analytical method development and quality control.
Based on its molecular formula C11H7F2NO3, Methyl 5-(2,4-Difluorophenyl)isoxazole-3-carboxylate contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, fluorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 239.17 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.
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), Methyl 5-(2,4-Difluorophenyl)isoxazole-3-carboxylate 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 | C11H7F2NO3 |
| Molecular Weight | 239.17 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1989 |
| Halogen Content | F-containing |
| Nitrogen Atoms | 1 |
Related Methyl Standards
- [5-(2,4-Difluorophenyl)isoxazol-3-yl]acetic acid (CAS 1105191-64-7)
- 5-[(2,5-Difluorophenyl)methyl]-1,2-oxazole-3-carboxylic Acid (CAS 1258503-80-8)
- 2-[2-(3,4-difluorophenyl)-1,3-oxazol-4-yl]acetic acid (CAS 1311316-26-3)
- 3-(2,3-Difluorophenyl)-5-methylisoxazole-4-carboxylic acid (CAS 1494042-42-0)
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- 1-(3,5-Difluorophenyl)-5-methyl-1h-1,2,3-triazole-4-carboxylic acid (CAS 1094411-40-1)
- 1-(3,4-difluorophenyl)-5-methyl-1H-1,2,3-triazole-4-carboxylic acid (CAS 1152513-29-5)
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