5-Aminoisoxazole-3-carboxylic acid CAS 1367940-06-4
| CAS No. | 1367940-06-4 |
| Molecular Formula | C4H4N2O3 |
| Molecular Weight | 128.09 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 5-Aminoisoxazole-3-carboxylic acid.
CATO supplies 5-Aminoisoxazole-3-carboxylic acid (CAS 1367940-06-4), a certified reference material (molecular formula C4H4N2O3, MW 128.09 g/mol) for analytical method development and quality control.
Based on its molecular formula C4H4N2O3, 5-Aminoisoxazole-3-carboxylic acid 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 128.09 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.
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), 5-Aminoisoxazole-3-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 | 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)
- 3-Aminoisoxazole-4-carboxylic acid (CAS 1378751-65-5)
- 5-Aminoisoxazole-4-carboxylic acid (CAS 1420802-69-2)
- 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
- 1,3-Thiazol-2-ylmethylamine (CAS 1349699-86-0)
- Piperazine-2,3,5-trione (CAS 13484-48-5)
- 3-Hydroxyisoxazole-5-carboxamide (CAS 14016-01-4)
- 4-Amino-1,2,5-oxadiazole-3-carboxamide (CAS 13300-88-4)
- 1-Methyl-N-neopentyl-1h-pyrazol-4-amine (CAS 1250380-67-6)
- N-(4-Fluoro-2-methylphenyl)benzamide (CAS 401-25-2)
- 4-Hydroxy-3-[(4-hydroxyphenyl)methyl]-5-methoxy-benzaldehydeDISCONTINUED (CAS 1141892-38-7)
- 6-Methyl-2-(4-pentylbenzoyl)-pyridine (CAS 1187168-75-7)
- 1-(Trimethylsilyl)-3,4-dimethoxybenzene (CAS 52287-49-7)
- 14-Heptacosanone (CAS 542-50-7)
- 2-(1-Methyl-5-nitro-1H-imidazol-2-yl)-5-(propylthio)-1,3,4-thiadiazole (CAS 207236-20-2)
- 4-(2-Methylpropoxy)-1-phenyl-1h-pyrazole-3-carboxylic acid (CAS 1152512-05-4)
- 3-chloro-2-fluoro-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine (CAS 1073353-71-5)
- Allo-Thr7-Tirzepatide (CAS CATO-CPTD788933)
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