5-Aminoisoxazole-4-carboxylic acid CAS 1420802-69-2
| CAS No. | 1420802-69-2 |
| Molecular Formula | C4H4N2O3 |
| Molecular Weight | 128.09 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 5-Aminoisoxazole-4-carboxylic acid (CAS 1420802-69-2), a certified reference material (molecular formula C4H4N2O3, MW 128.09 g/mol) for analytical method development and quality control.
Owing to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage, 5-Aminoisoxazole-4-carboxylic acid is typically off-white to pale yellow liquid. Its solid-state physicochemical attributes — including a molecular weight of 128.09 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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 manufactures 5-Aminoisoxazole-4-carboxylic acid under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C4H4N2O3 |
| Molecular Weight | 128.09 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1991 |
| Nitrogen Atoms | 2 |
Related Aminoisoxazole Standards
- 3-Aminoisoxazole-5-carboxylic acid (CAS 1013929-55-9)
- 5-Aminoisoxazole-3-carboxylic acid (CAS 1367940-06-4)
- 3-Aminoisoxazole-4-carboxylic acid (CAS 1378751-65-5)
- Methyl 5-Aminoisoxazole-3-carboxylate (CAS 1629161-40-5)
- Methyl 3-aminoisoxazole-5-carboxylate (CAS 203586-95-2)
- Methyl 5-aminoisoxazole-4-carboxylate (CAS 145798-74-9)
- 3-Aminoisoxazole-5-carbonitrile (CAS 1368187-62-5)
- 5-Aminoisoxazole-3-carbonitrile (CAS 1369370-61-5)
Recommended Standards
- 3-Hydroxyisoxazole-5-carboxamide (CAS 14016-01-4)
- 1-Amino-1H-1,2,4-triazole-3-carboxylic acid (CAS 142415-65-4)
- 3-Nitro-1H-pyrazol-1-amine (CAS 150017-54-2)
- 5-Nitro-1H-pyrazol-1-amine (CAS 150017-59-7)
- 4-Chloro-2-((cyclobutylmethyl)thio)pyridine (CAS 1346707-40-1)
- 6-Methyl-3-nitropyridine-2-carboxylic acid (CAS 21203-64-5)
- 6-Oxo-6-phenylhexanenitrile (CAS 28353-03-9)
- JPB 25 (CAS 54903-66-1)
- 1-Ethynyl-4-isocyanatobenzene (DISCONTINUED) (CAS 814264-50-1)
- 2,6-Dimethoxy-5-methylpyridine-3-methanol (CAS 1879026-22-8)
- N-ethylpyrazin-2-amine (CAS 65032-08-8)
- 6,8-Dibromo-2-(5-nitrofuran-2-yl)imidazo[1,2-a]pyridine (CAS 61982-61-4)
- [1,3-Bis[2,6-bis[bis(4-methylphenyl)methyl]-4-methylphenyl]-1,3-dihydro-2H-imidazol-2-ylidene]hydroxygold-HF (CAS 1690356-94-5)
- D-Asp15-Tirzepatide (CAS CATO-CPTD788919)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com