1-(3-(4-Chlorophenyl)isoxazol-4-yl)ethanone CAS 129144-38-3
| CAS No. | 129144-38-3 |
| Molecular Formula | C11H8ClNO2 |
| Molecular Weight | 221.64 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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 supplies 1-(3-(4-Chlorophenyl)isoxazol-4-yl)ethanone (CAS 129144-38-3), a certified reference material (molecular formula C11H8ClNO2, MW 221.64 g/mol) for analytical method development and quality control.
Based on its molecular formula C11H8ClNO2, 1-(3-(4-Chlorophenyl)isoxazol-4-yl)ethanone contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 221.64 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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 | C11H8ClNO2 |
| Molecular Weight | 221.64 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; 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.) | 1993 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
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- 3-(4-Chlorophenyl)-1H-pyrazole-4-carbaldehydeoxime (CAS 1199253-23-0)
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Recommended Standards
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- 6-(Dimethylamino)-1H-indole-2-carboxylic acid (CAS 100060-36-4)
- 2-(3,3-Dimethoxypropyl)-6-nitro-2H-indazole (CAS 854922-81-9)
- 6-(Chloromethyl)-1-phenyl-1h,4h,5h-pyrazolo[3,4-d]pyrimidin-4-one (CAS 871478-89-6)
- 4-Methoxy-1-indanol (CAS 67199-57-9)
- 3-(Methoxymethyl)-1-phenyl-1H-pyrazol-5-amine (CAS 1430-74-6)
- 2-(Piperidin-4-yl)ethanethiol (CAS 89856-03-1)
- Ethyl (E)-7-(2-ethoxyprop-1-en-1-yl)-2-methyl-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate (CAS 1374510-88-9)
- Proinsulin C-Peptide (55-89) (human) (CAS 11097-48-6)
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