N-(4-Ethylphenyl)-5-methylisoxazole-4-carboxamide CAS 724436-18-4
| CAS No. | 724436-18-4 |
| Molecular Formula | C13H14N2O2 |
| Molecular Weight | 230.26 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 N-(4-Ethylphenyl)-5-methylisoxazole-4-carboxamide (CAS 724436-18-4), a certified reference material (molecular formula C13H14N2O2, MW 230.26 g/mol) for analytical method development and quality control.
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, N-(4-Ethylphenyl)-5-methylisoxazole-4-carboxamide is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 230.26 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 | C13H14N2O2 |
| Molecular Weight | 230.26 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1986 |
| Nitrogen Atoms | 2 |
Related N Standards
- Methyl 3-(4-ethylphenyl)-1h-pyrazole-5-carboxylate (CAS 1044837-18-4)
- 3-(4-Ethylphenyl)-1-methyl-1H-pyrazole-5-carboxylic acid (CAS 1177307-55-9)
- N-(2-Ethylphenyl)-5-methylisoxazole-4-carboxamide (CAS 794549-48-7)
- N-(3-Ethylphenyl)-5-methylisoxazole-4-carboxamide (CAS 724436-22-0)
- 3-(4-ethylphenyl)-1H-pyrazole-5-carbohydrazide (CAS 1026764-45-3)
- 5-((2-Ethylphenyl)amino)-6-methyl-1,2,4-triazin-3-ol (CAS 496033-02-4)
- 5-((4-Ethylphenyl)amino)-6-methyl-1,2,4-triazin-3-ol (CAS 526187-11-1)
- (4-Ethylphenyl)(3-fluorophenyl)methanol (CAS 844683-70-1)
Recommended Standards
- N-(4-Benzyl-2-methyloxazol-5-yl)acetamide (CAS 87783-75-3)
- N-(4-methoxybenzyl)-1H-pyrrole-2-carboxamide (CAS 478249-53-5)
- N-(4-((furan-2-ylmethyl)amino)phenyl)acetamide (CAS 312930-00-0)
- N,3,5-trimethyl-N-phenylisoxazole-4-carboxamide (CAS 478260-85-4)
- 3-(3,3-Dimethylbutanamido)cyclopentane-1-carboxylic acid (CAS 1497783-57-9)
- 1-Benzhydryl-1H-benzo[d][1,2,3]triazole (CAS 73006-65-2)
- GLy-gly-tyr-oh hcl (CAS 2140265-17-2)
- 1-(4-Fluorophenyl)-4,5,6,7-tetrahydro-1h-pyrazolo[4,3-c]pyridine (CAS 1188331-33-0)
- 4-Bromo-2,5-dimethylthiophene-3-carbaldehyde (CAS 887575-78-2)
- 4-(2,4-Dichlorophenyl)-2-methyl-6-oxo-1,4,5,6-tetrahydropyridine-3-carboxylic acid (CAS 423120-07-4)
- n-(3-(1h-Imidazol-1-yl)propyl)tetrahydro-2h-thiopyran-3-amine (CAS 1339404-33-9)
- 1-(Isoquinolin-1-yl)-N-methylmethanamine (CAS 144163-92-8)
- 2-(2,5-Dimethylphenyl)-1,3-dioxoisoindoline-5-carboxylic acid (CAS 306320-92-3)
- Insulin Degludec Impurity 10 (CAS CATO-C4X-215710)
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