Ethyl 3-[1-(4-fluorophenyl)-1H-pyrazol-4-yl]-1,2,4-oxadiazole-5-carboxylate CAS 1242885-75-1
| CAS No. | 1242885-75-1 |
| Molecular Formula | C14H11FN4O3 |
| Molecular Weight | 302.26 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Structurally, Ethyl 3-[1-(4-fluorophenyl)-1H-pyrazol-4-yl]-1,2,4-oxadiazole-5-carboxylate (C14H11FN4O3) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, fluorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 11.0, corresponding to approximately 11 ring(s) or double-bond equivalent(s). With a molecular weight of 302.26 g/mol, it falls into the moderately-high-molecular-weight range. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
Ethyl 3-[1-(4-fluorophenyl)-1H-pyrazol-4-yl]-1,2,4-oxadiazole-5-carboxylate (CAS 1242885-75-1), molecular formula C14H11FN4O3 and molecular weight 302.26 g/mol, is a CATO reference standard with documented purity and traceability.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C14H11FN4O3 |
| Molecular Weight | 302.26 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1990 |
| Halogen Content | F-containing |
| Nitrogen Atoms | 4 |
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Recommended Standards
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- 3-(Difluoromethyl)-5-((4-methoxy-2-nitrophenyl)thio)-4H-1,2,4-triazole (CAS 1706450-48-7)
- 3-Bromo-2-fluoro-5-(trifluoromethyl)benzonitrile (CAS 133013-32-8)
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- N-(4-acetylphenyl)-5-ethylthiophene-3-carboxamide (CAS 895935-74-7)
- 4-Hydroxy Trimethoprim-13C3 (CAS 1391053-67-0)
- 4,4'-((1E,1'E)-Hydrazine-1,2-diylidenebis(methanylylidene))bis(N,N-dimethylaniline) (CAS 108026-63-7)
- 3-Amino-N-cyclopropyl-4-(dimethylamino)benzamide (CAS 1435804-59-3)
- 6'-Amino-3'-ethyl-2-oxo-1-propyl-2'H-spiro[indoline-3,4'-pyrano[2,3-c]pyrazole]-5'-carbonitrile (CAS 939893-64-8)
- 4,5-Diamino-2-bromobenzonitrile (CAS 1934682-48-0)
- 5-Fluoro-2-(methoxycarbonyl)benzeneboronic acid pinacol ester, 97% (CAS 1400976-17-1)
- Tirzepatide Impurity 20 (CAS CATO-C4X-324020)
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