3-(1-Ethyl-1H-pyrazol-4-yl)-isoxazole-5-carboxylic acid CAS 957487-34-2
| CAS No. | 957487-34-2 |
| Molecular Formula | C9H9N3O3 |
| Molecular Weight | 207.19 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies 3-(1-Ethyl-1H-pyrazol-4-yl)-isoxazole-5-carboxylic acid (CAS 957487-34-2), a certified reference material (molecular formula C9H9N3O3, MW 207.19 g/mol) for analytical method development and quality control.
Based on its molecular formula C9H9N3O3, 3-(1-Ethyl-1H-pyrazol-4-yl)-isoxazole-5-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 207.19 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.
CATO manufactures 3-(1-Ethyl-1H-pyrazol-4-yl)-isoxazole-5-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 | C9H9N3O3 |
| Molecular Weight | 207.19 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 |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Nitrogen Atoms | 3 |
Recommended Standards
- 3-(1,5-Dimethyl-1h-pyrazol-4-yl)-1,2-oxazole-5-carboxylic acid (CAS 957484-18-3)
- 3-(2-Azidoethoxy)benzoic acid (CAS 2024604-49-5)
- 3-(1,3-Dimethyl-1h-pyrazol-4-yl)-1,2-oxazole-5-carboxylic acid (CAS 957484-20-7)
- 3-(3-oxo-[1,2,4]triazolo[4,3-a]pyridin-2(3H)-yl)propanoic acid (CAS 53304-46-4)
- 1,1,2,2-Tetrakis(4-(1H-benzo[d]imidazol-1-yl)phenyl)ethene (CAS 2171498-77-2)
- 3-Chloro-N-methyl-1H-1,2,4-triazole-5-carboxamide (CAS 1232800-16-6)
- N1-(2-Aminoethyl)benzene-1,2-diamine (CAS 128995-76-6)
- (5,6,7,8-Tetrahydroisoquinolin-3-yl)methanol (CAS 37009-23-7)
- 4'-Methyl-[1,1'-biphenyl]-3-carboxylic acid (CAS 147404-69-1)
- Tetrapropenylsuccinic Anhydride (mixture of branched chain isomers) (CAS 428493-97-4)
- (5,6-Dihydro-8H-imidazo[2,1-c][1,4]oxazin-6-yl)methanol (CAS 1628636-87-2)
- 5-Bromo-2-fluoro-3-trifluoromethylphenylboronic acid (CAS 2096341-70-5)
- 2'-Methyl-[1,1'-biphenyl]-3,4',5-tricarboxylic acid (CAS 1262010-73-0)
- Glucagon receptor antagonists-2 (CAS 202917-18-8)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
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