5-(1,5-Dimethyl-1H-pyrazol-4-yl)isoxazole-3-carboxylic acid CAS 957312-71-9
Purity 97%+In StockPharmaceutical Standards
| CAS No. | 957312-71-9 |
| Molecular Formula | C9H9N3O3 |
| Molecular Weight | 207.19 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
5-(1,5-Dimethyl-1H-pyrazol-4-yl)isoxazole-3-carboxylic acid (CAS 957312-71-9) 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 |
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Recommended Standards
- 5-(1,3-Dimethyl-1h-pyrazol-4-yl)isoxazole-3-carboxylic acid (CAS 956369-25-8)
- 5-(1-Ethyl-1h-pyrazol-4-yl)isoxazole-3-carboxylic acid (CAS 957487-31-9)
- 4-Methyl-7-nitro-3,4-dihydroquinoxalin-2(1H)-one (CAS 449760-84-3)
- rac N-Acetyl Norlaudanosine-d3 (CAS 1216654-63-5)
- 1,3-Dioxolane-2-carbaldehyde (CAS 19800-17-0)
- 3-(Naphthalen-2-yl)butanoic acid (CAS 33417-02-6)
- 3-(4-Chloro-2-methoxyphenyl)isoxazol-5-amine (CAS 1248903-23-2)
- 2-(Cyclohex-1-en-1-yl)-N-(4-fluorobenzyl)ethan-1-amine hydrochloride (CAS 1048640-53-4)
- Rosuvastatin Impurity 114 (CAS CATO-C4X-1169114)
- Tirzepatide Impurity 19 X TFA Salt (CAS CATO-C4X-324019)
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