Methyl 5-(4-aminophenyl)isoxazole-3-carboxylate CAS 879216-18-9
| CAS No. | 879216-18-9 |
| Molecular Formula | C11H10N2O3 |
| Molecular Weight | 218.21 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Methyl 5-(4-aminophenyl)isoxazole-3-carboxylate (CAS 879216-18-9), molecular formula C11H10N2O3 and molecular weight 218.21 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C11H10N2O3, Methyl 5-(4-aminophenyl)isoxazole-3-carboxylate contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 218.21 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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.
As a certified reference material (CRM), Methyl 5-(4-aminophenyl)isoxazole-3-carboxylate 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 | C11H10N2O3 |
| Molecular Weight | 218.21 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, ethanol, DMSO |
| 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.) | 1987 |
| Nitrogen Atoms | 2 |
Related Methyl Standards
- Methyl 1-(4-aminophenyl)-1h-1,2,3-triazole-4-carboxylate (CAS 1049605-94-8)
- Methyl 1-(2-aminophenyl)-1h-1,2,3-triazole-4-carboxylate (CAS 1049873-33-7)
- 2-(4-Aminophenyl)-5-methyloxazole-4-carboxylic acid (CAS 1334486-76-8)
- 2-(3-Aminophenyl)-5-methyloxazole-4-carboxylic acid (CAS 1334493-14-9)
- 2-(2-Aminophenyl)-5-methyloxazole-4-carboxylic acid (CAS 1334493-58-1)
- Methyl 5-(3-aminophenyl)isoxazole-3-carboxylate (CAS 1526853-06-4)
- 1-(4-Aminophenyl)-5-methyl-1H-1,2,4-triazole-3-carboxylic acid (CAS 944279-03-2)
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Recommended Standards
- Methyl 5-(3-hydroxyphenyl)furan-2-carboxylate (CAS 834884-73-0)
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- Ethyl 4-(difluoromethyl)-2-phenylpyrimidine-5-carboxylate (CAS 1708437-52-8)
- N-Boc-3-(methylsulfonyl)-L-phenylalanine Benzyl Ester (CAS 1289646-78-1)
- 2,2-Dimethyl-2H-chromen-5-ol (CAS 6537-43-5)
- 2-(2-(4-Bromo-1h-pyrazol-1-yl)ethoxy)ethanol (CAS 1291797-86-8)
- N-cyclopropylazetidine-3-carboxamide (CAS 1073555-63-1)
- 2-Ethyl-5-methyl-N-(3-morpholinopropyl)-3-phenylpyrazolo[1,5-a]pyrimidin-7-amine (CAS 900278-15-1)
- 4-(3-Chloro-4-fluorophenoxy)aniline (CAS 383126-92-9)
- 34364-26-6 U97R52915N Bismuth neodecanoate Bismuth(3+) neodecanoate Neodecanoic acid, bismuth(3+) salt (3:1) Neodecanoic acid, bismuth(3+) salt EINECS 251-964-6 Bismuth(III) neodecanoate UNII-U97R52915N (CAS 34364-26-6)
- 4-Methyl-3-phenylpiperidine hydrochloride (CAS 861020-08-8)
- Semaglutide Impurity 7 (CAS CATO-C4X-22267)
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