3-(1-Ethyl-1h-pyrazol-5-yl)isoxazole-5-carboxylic acid CAS 1006486-16-3
| CAS No. | 1006486-16-3 |
| Molecular Formula | C9H9N3O3 |
| Molecular Weight | 207.19 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 207.19 g/mol gives 3-(1-Ethyl-1h-pyrazol-5-yl)isoxazole-5-carboxylic acid distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
CATO supplies 3-(1-Ethyl-1h-pyrazol-5-yl)isoxazole-5-carboxylic acid (CAS 1006486-16-3), a certified reference material (molecular formula C9H9N3O3, MW 207.19 g/mol) for analytical method development and quality control.
3-(1-Ethyl-1h-pyrazol-5-yl)isoxazole-5-carboxylic acid (C9H9N3O3) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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.
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 | 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.) | 1988 |
| Nitrogen Atoms | 3 |
Recommended Standards
- 5-(1-Ethyl-1h-pyrazol-3-yl)-1,2-oxazole-3-carboxylic acid (CAS 1006484-70-3)
- 2-{dimethyl-[1,2,3,4]tetrazolo[1,5-a]pyrimidin-6-yl}acetic acid (CAS 1016708-53-4)
- 5-(1-Ethyl-1h-pyrazol-5-yl)-1,2-oxazole-3-carboxylic acid (CAS 1006459-13-7)
- 2,2,2-Trifluoro-N-(1-(5-methylfuran-2-yl)ethyl)ethan-1-amine (CAS 1016737-15-7)
- 1-(1H-Imidazol-1-yl)-4-(4-methoxyphenyl)butan-2-one (CAS 763881-08-9)
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