5-(1-Ethyl-1h-pyrazol-4-yl)isoxazole-3-carboxylic acid CAS 957487-31-9
Purity 97%+In StockPharmaceutical Standards
| CAS No. | 957487-31-9 |
| Molecular Formula | C9H9N3O3 |
| Molecular Weight | 207.19 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
5-(1-Ethyl-1h-pyrazol-4-yl)isoxazole-3-carboxylic acid (CAS 957487-31-9) reference standard, produced by CATO (ISO 17034 / CNAS / ANAB accredited). Molecular formula: C9H9N3O3. Molecular weight: 207.19 g/mol. Trusted by 10,000+ laboratories worldwide for pharmaceutical analysis and QC.
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
- 5-(1,5-Dimethyl-1H-pyrazol-4-yl)isoxazole-3-carboxylic acid (CAS 957312-71-9)
- 5-(4-Amino-3-methoxyphenyl)-1,3,4-oxadiazol-2(3H)-one (CAS 648917-63-9)
- 5-(1,3-Dimethyl-1h-pyrazol-4-yl)isoxazole-3-carboxylic acid (CAS 956369-25-8)
- (4-(((4-Methylphenyl)sulfonamido)methyl)phenyl)boronic acid (CAS 1809866-68-9)
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