1-(5-Phenylisoxazol-3-yl)ethanone CAS 7063-98-1
| CAS No. | 7063-98-1 |
| Molecular Formula | C11H9NO2 |
| Molecular Weight | 187.19 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 187.19 g/mol gives 1-(5-Phenylisoxazol-3-yl)ethanone distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
CATO supplies 1-(5-Phenylisoxazol-3-yl)ethanone (CAS 7063-98-1), a certified reference material (molecular formula C11H9NO2, MW 187.19 g/mol) for analytical method development and quality control.
1-(5-Phenylisoxazol-3-yl)ethanone (C11H9NO2) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. Its high carbon-to-hydrogen ratio confers good lipid solubility, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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.
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 | C11H9NO2 |
| Molecular Weight | 187.19 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1959 |
| Nitrogen Atoms | 1 |
Related Phenylisoxazol Standards
- 1-(3-Phenylisoxazol-4-yl)ethanone (CAS 13858-95-2)
- (5-Methyl-3-phenylisoxazol-4-yl)methanamine (CAS 306935-01-3)
- (3-Phenylisoxazol-5-yl)boronic acid (CAS 5868-54-2)
- (3-Methyl-5-phenylisoxazol-4-yl)methanol (CAS 113826-87-2)
- 2-(3-Phenylisoxazol-5-yl)ethan-1-ol (CAS 14691-31-7)
- 1-(5-Phenylisoxazol-3-yl)ethan-1-ol (CAS 94815-31-3)
- 2-Ethyl-5-phenylisoxazol-3(2H)-one (CAS 945-59-5)
- 2-(3-Phenylisoxazol-5-yl)acetonitrile (CAS 129681-59-0)
Recommended Standards
- 1-(5-(Pyridin-4-yl)furan-2-yl)ethanone (CAS 55484-35-0)
- 1-(8-Hydroxyquinolin-5-yl)ethanone (CAS 2598-31-4)
- 1-(4-Hydroxy-quinolin-3-yl)-ethanone (CAS 6622-19-1)
- 1-(Benzo[d]isoxazol-3-yl)cyclopropane-1-carbaldehyde (CAS 2241482-51-7)
- 2',5'-Bis(2-(2-methoxyethoxy)ethoxy)-[1,1':4',1''-terphenyl]-4,4''-diamine (CAS 2172944-60-2)
- 3-Chloro-2-(trifluoromethyl)phenol (CAS 106877-34-3)
- 5-(Azetidin-3-yloxy)-2-bromopyridine (CAS 1146089-82-8)
- Methyl 5-((4-propylphenoxy)methyl)furan-2-carboxylate (CAS 402602-98-6)
- N3-[2-(4-chlorophenyl)-2-oxoethyl]-6-chloro-4-(trifluoromethyl)nicotinamide (CAS 287978-96-5)
- 5-FAM-Woodtide trifluoroacetate salt (CAS 1566528-51-5)
- Methyl 3-amino-4-methoxybenzo[b]thiophene-2-carboxylate (CAS 35212-88-5)
- (2-Chloropyrimidin-4-yl)boronic acid (CAS 1228431-85-3)
- 4-(2,3-Dihydrobenzo[b][1,4]dioxin-6-yl)-5-(furan-2-yl)-4H-1,2,4-triazole-3-thiol (CAS 306936-86-7)
- Semaglutide impurity 331 (CAS CATO-C4X-2226231)
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