3-(4-(4-Methoxyphenoxy)phenyl)-5-methylisoxazole-4-carboxylic Acid CAS 1159981-33-5
| CAS No. | 1159981-33-5 |
| Molecular Formula | C18H15NO5 |
| Molecular Weight | 325.32 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
3-(4-(4-Methoxyphenoxy)phenyl)-5-methylisoxazole-4-carboxylic Acid (C18H15NO5) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage. The carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
CATO supplies 3-(4-(4-Methoxyphenoxy)phenyl)-5-methylisoxazole-4-carboxylic Acid (CAS 1159981-33-5), a certified reference material (molecular formula C18H15NO5, MW 325.32 g/mol) for analytical method development and quality control.
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), 3-(4-(4-Methoxyphenoxy)phenyl)-5-methylisoxazole-4-carboxylic Acid 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 | C18H15NO5 |
| Molecular Weight | 325.32 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 methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1989 |
| Nitrogen Atoms | 1 |
Related Methoxyphenoxy Standards
- N-(4-(2-Methoxyphenoxy)but-2-yn-1-yl)-3-phenylpropanamide (CAS 1421464-66-5)
- 1-(3-(2-Methoxyphenoxy)propyl)-2-methyl-1H-indole-3-carbaldehyde (CAS 640254-42-8)
- 1-[4-(4-Methoxyphenoxy)phenyl]-5-oxopyrrolidine-3-carboxylic acid (CAS 894609-33-7)
- 3-(3-(4-Methoxyphenoxy)-2-oxopyrrolidin-1-yl)benzoic acid (CAS 649774-25-4)
- Ethyl 4-(4-methoxyphenoxy)-1-methyl-1H-pyrazolo[3,4-b]pyridine-5-carboxylate (CAS 866144-59-4)
- 2-(2-Methoxyphenoxy)-1-(2-phenylmorpholino)ethan-1-one (CAS 953946-78-6)
- 1,3-Bis(4-methoxyphenoxy)benzene (CAS 13118-91-7)
- 1,4-Bis(3-methoxyphenoxy)benzene (CAS 5024-84-0)
Recommended Standards
- 2-(Dimethylamino)-9-((2R,3R,4R,5R)-4-hydroxy-5-(hydroxymethyl)-3-methoxytetrahydrofuran-2-yl)-1H-purin-6(9H)-one (CAS 113886-73-0)
- Methyl 4-[(1-methyl-2,3-dioxo-2,3-dihydropyrido-[2,3-b]pyrazin-4(1H)-yl)methyl]benzoate (CAS 1171456-14-6)
- 2-(4-(4-Hydroxyphenyl)-3-(4-methoxyphenyl)isoxazol-5-yl)acetic acid (CAS 112453-44-8)
- 4-Methoxy-N-((5-(4-nitrophenyl)-1H-1,2,4-triazol-3-yl)methyl)aniline (CAS 1171939-94-8)
- (4-(4-Ethylpiperazine-1-carbonyl)-3-fluorophenyl)boronic acid (CAS 1704073-51-7)
- 2-(Difluoromethyl)-3-fluoro-4-hydroxypyridine-6-carbonyl chloride (CAS 1807137-05-8)
- N1-cyclopentyl-N1-methyl-N2-(thietan-3-yl)ethane-1,2-diamine (CAS 1863099-69-7)
- 6-Ethynyl-2-methyl-3-nitropyridine (CAS 1204333-42-5)
- Evobrutinib (CAS 1415823-73-2)
- tert-Butyl N-[(2z)-2-(3,4-dimethoxyphenyl)-2-(hydroxyimino)ethyl]carbamate (CAS 912762-67-5)
- 7-Chloropyrrolo[1,2-a]quinoxalin-4(5H)-one (CAS 160657-02-3)
- Tert-butyl ((3-fluoro-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-2-yl)methyl)carbamate (CAS 1240133-41-8)
- 3-(3-AMino-5-chloro-2-oxo-2h-pyrazin-1-yl)-benzoic acid methyl ester (CAS 1820712-46-6)
- Peptide 431 (CAS CATO-CPTD788431)
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