3-Methoxyisoxazole-4-carboxylic acid CAS 753486-89-4
| CAS No. | 753486-89-4 |
| Molecular Formula | C5H5NO4 |
| Molecular Weight | 143.10 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The molecular framework of 3-Methoxyisoxazole-4-carboxylic acid (C5H5NO4) is characterized by a carbohydrate-derived structure, an amide group. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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).
3-Methoxyisoxazole-4-carboxylic acid (CAS 753486-89-4), molecular formula C5H5NO4 and molecular weight 143.10 g/mol, is a CATO reference standard with documented purity and traceability.
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 manufactures 3-Methoxyisoxazole-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 | C5H5NO4 |
| Molecular Weight | 143.10 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.) | 1986 |
| Nitrogen Atoms | 1 |
Related Methoxyisoxazole Standards
- 4-Methoxyisoxazole-3-carboxylic acid (CAS 1505931-33-8)
- 5-Methoxyisoxazole-4-carboxylic acid (CAS 886363-65-1)
- 3-Methoxyisoxazole-5-carboxamide (CAS 16880-10-7)
- methyl 3-methoxyisoxazole-5-carboxylate (CAS 16880-11-8)
- Methyl 5-methoxyisoxazole-3-carboxylate (CAS 80872-10-2)
- 3-Methoxyisoxazole-5-carbaldehyde (CAS 16446-36-9)
- 5-Methoxyisoxazole-3-carbonyl chloride (CAS 53064-59-8)
- Ethyl 5-methoxyisoxazole-4-carboxylate (CAS 1314983-30-6)
Recommended Standards
- 3-Methoxy-4-nitro-1H-pyrazole (CAS 400755-41-1)
- 3-Methyl-4-nitroisoxazol-5-amine (CAS 41230-51-7)
- 2-Nitro-1H-imidazole-4-carbaldehyde (CAS 89176-71-6)
- 4-(Hydroxymethyl)-1,2,5-oxadiazole-3-carboxamide (CAS 73314-63-3)
- 2-(4-Chlorobenzyl)-N-(4-methoxyphenyl)thiazole-4-carboxamide (CAS 478030-24-9)
- 3-Bromo-2-fluorophenylacetonitrile (CAS 874285-03-7)
- 2-((3-Methoxyphenyl)carbamoyl)cyclohexane-1-carboxylic acid (CAS 301352-85-2)
- Perfluorocyclohexylcarboxylic Acid Fluoride (CAS 6588-63-2)
- 3',6'-Dihydroxy-N-(6-hydroxyhexyl)-3-oxo-3H-spiro[isobenzofuran-1,9'-xanthene]-5-carboxamide (CAS 869889-37-2)
- N,1-Dicyclohexyl-2-imino-10-methyl-5-oxo-2,5-dihydro-1H-dipyrido[1,2-a:2',3'-d]pyrimidine-3-carboxamide (CAS 617694-54-9)
- 2-Chloro-2'-deoxycytidine (CAS 10212-19-8)
- 10-Chloroanthracene-9-carbonitrile (CAS 1213-82-7)
- N-(3-(2-Nitrilo-2-((4-methylphenyl)sulfonyl)vinyl)(2-thienyl))ethoxyformamide (CAS 1159976-53-0)
- ((Cys31,Nva34)-Neuropeptide Y (27-36))2 (CAS 172997-92-1)
Why CATO?
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