3-(4-Methoxyphenyl)-5-methylisoxazole-4-carboxylic acid CAS 93041-45-3
| CAS No. | 93041-45-3 |
| Molecular Formula | C12H11NO4 |
| Molecular Weight | 233.22 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Owing to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage, 3-(4-Methoxyphenyl)-5-methylisoxazole-4-carboxylic acid is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 233.22 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.
3-(4-Methoxyphenyl)-5-methylisoxazole-4-carboxylic acid (CAS 93041-45-3) is a high-purity analytical reference standard with the molecular formula C12H11NO4 and a molecular weight of 233.22 g/mol.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), 3-(4-Methoxyphenyl)-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 | C12H11NO4 |
| Molecular Weight | 233.22 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; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1983 |
| Nitrogen Atoms | 1 |
Related Methoxyphenyl Standards
- [5-(4-Methoxyphenyl)isoxazol-3-yl]acetic acid (CAS 1018584-41-2)
- [5-(3-Methoxyphenyl)isoxazol-3-yl]acetic acid (CAS 1018584-61-6)
- N-(5-(4-Methoxyphenyl)-1,2,4-oxadiazol-3-yl)acetamide (CAS 124573-17-7)
- Methyl 2-(4-methoxyphenyl)oxazole-4-carboxylate (CAS 154405-98-8)
- 1-(3-Methoxyphenyl)-5-methyl-1h-1,2,3-triazole-4-carboxylic acid (CAS 386264-51-3)
- 1-(4-Methoxyphenyl)-1H-1,2,3-triazole-4-carboxylic acid (CAS 4916-13-6)
- 1-(4-Methoxyphenyl)-5-methyl-1h-1,2,3-triazole-4-carboxylic acid (CAS 31802-54-7)
- 2-(3-Methoxyphenyl)-5-methyloxazole-4-carboxylic acid (CAS 355020-54-1)
Recommended Standards
- 3-(4-Methoxybenzoyl)pyrrolidine-2,5-dione (CAS 6343-29-9)
- 3-(4-Methoxyphenyl)isoxazole-5-carbohydrazide (CAS 890095-68-8)
- 3-(4-Methoxy-3-methylphenyl)isoxazole-5-carboxylic acid (CAS 901927-22-8)
- 3-(4-Nitrobenzylidene)pentane-2,4-dione (CAS 29197-16-8)
- Ethyl 2-amino-4,6-difluorobenzoate (CAS 1147107-15-0)
- (R)-3-Amino-N-methyl-4-(phenylthio)butanamide (CAS 1012059-97-0)
- 1-[3-(2-methoxyphenyl)-1,2,4-oxadiazol-5-yl]ethan-1-amine hydrochloride (CAS 1354962-91-6)
- 2-[1-(4-Chlorophenyl)ethoxy]ethanol (CAS 20795-42-0)
- 4-(5-bromo-1,3,4-thiadiazol-2-yl)-cis-2,6-dimethylmorpholine (CAS 1357147-40-0)
- 4-Chloro-6-ethyl-N-methyl-1,3,5-triazin-2-amine (CAS 57639-21-1)
- RMC6236 Intermediate 25 (CAS CATO-CIM-103913)
- 4-Oxazolecarboxamide (CAS 23012-15-9)
- 2-(((9H-fluoren-9-yl)methoxy)carbonyl)-4-methyl-2-azabicyclo[2.1.1]Hexane-1-carboxylic acid (CAS 2002257-09-0)
- Insulin Degludec impurity 4 (CAS CATO-C4X-21574)
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