Ethyl 3-hydroxyisoxazole-5-carboxylate CAS 13626-61-4
| CAS No. | 13626-61-4 |
| Molecular Formula | C6H7NO4 |
| Molecular Weight | 157.12 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Ethyl 3-hydroxyisoxazole-5-carboxylate (CAS 13626-61-4) is a high-purity analytical reference standard with the molecular formula C6H7NO4 and a molecular weight of 157.12 g/mol.
Based on its molecular formula C6H7NO4, Ethyl 3-hydroxyisoxazole-5-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 157.12 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C6H7NO4 |
| Molecular Weight | 157.12 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| 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 |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1960 |
| Nitrogen Atoms | 1 |
Related Ethyl Standards
- Ethyl 4-hydroxyisoxazole-3-carboxylate (CAS 84691-16-7)
- Methyl 3-Hydroxyisoxazole-5-carboxylate (CAS 10068-07-2)
- Methyl 5-hydroxyisoxazole-3-carboxylate (CAS 1557026-77-3)
- 4-Hydroxyisoxazole-3,5-dicarboxylic acid (CAS 6496-98-6)
- 3-Hydroxyisoxazole-5-carboxylic acid (CAS 13626-60-3)
- 4-Hydroxyisoxazole-3-carboxylic Acid (CAS 178316-77-3)
- 5-Hydroxyisoxazole-3-carboxylic acid (CAS 933726-73-9)
- 3-Hydroxyisoxazole-5-carboxamide (CAS 14016-01-4)
Recommended Standards
- 4-Amino-3,5-difluorobenzaldehyde (CAS 135564-23-7)
- 5-Hydroxy-6-oxo-1,2,3,6-tetrahydropyridine-4-carboxylic acid (CAS 1367927-92-1)
- 3-Ethoxy-1,2-oxazole-5-carboxylic acid (CAS 135080-29-4)
- 2-Amino-3,5-difluorobenzaldehyde (CAS 1378795-86-8)
- cis-3,4-Difluoropyrrolidine (CAS 869532-50-3)
- Ethyl 5-amino-1-(2,4-dichlorobenzoyl)-1H-pyrazole-4-carboxylate (CAS 124281-80-7)
- 2-(Piperidin-4-yl)propanoic acid (CAS 90205-09-7)
- 2-methyl-8-azabicyclo[3.2.1]octan-3-one hydrochloride (CAS 2060040-28-8)
- Methyl 2-(4-hydroxy-3-(4-hydroxybut-1-yn-1-yl)phenyl)acetate (CAS 1354633-20-7)
- N-(4-chlorophenyl)-2-(2,4-dioxo-1,3-diazaspiro[4.5]Decan-3-yl)acetamide (CAS 731781-51-4)
- 2,4-Dichloro-5,5-dimethyl-5,7-dihydro-6H-pyrrolo[2,3-d]pyrimidin-6-one (CAS 1638771-74-0)
- Ethyl 2-(3-cyclopropyl-6-methyl-4-(trifluoromethyl)-1H-pyrazolo[3,4-b]pyridin-1-yl)acetate (CAS 1018141-86-0)
- 4-Chloro-6-(4-chlorophenyl)-2-(pyridin-3-yl)pyrimidine-5-carbonitrile (CAS 320417-58-1)
- Endo-[Glu]31-Liraglutide (CAS CATO-C4X-199234)
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