3-(4-Fluorophenyl)-1,2,4-oxadiazole-5-carboxylic acid CAS 944896-51-9
| CAS No. | 944896-51-9 |
| Molecular Formula | C9H5FN2O3 |
| Molecular Weight | 208.15 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
3-(4-Fluorophenyl)-1,2,4-oxadiazole-5-carboxylic acid (CAS 944896-51-9), molecular formula C9H5FN2O3 and molecular weight 208.15 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, fluorine substitution, 3-(4-Fluorophenyl)-1,2,4-oxadiazole-5-carboxylic acid is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 208.15 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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 | C9H5FN2O3 |
| Molecular Weight | 208.15 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Halogen Content | F-containing |
| Nitrogen Atoms | 2 |
Related Fluorophenyl Standards
- 5-(3-Fluorophenyl)-1,2,4-oxadiazole-3-carboxylic acid (CAS 1260798-67-1)
- 5-(2-Fluorophenyl)-1,2,4-oxadiazole-3-carboxylic acid (CAS 1260877-39-1)
- 3-(2-Fluorophenyl)-1,2,4-oxadiazole-5-carboxylic acid (CAS 944896-72-4)
- 5-(2-Fluorophenyl)-1,3,4-oxadiazole-2-carboxylic acid (CAS 944907-20-4)
- 5-(4-Fluorophenyl)-1,2,4-oxadiazole-3-carboxylic Acid (CAS 72542-80-4)
- 5-(4-Fluorophenyl)-1,3,4-oxadiazole-2-carboxylic acid (CAS 944898-08-2)
- 1-(4-Fluorophenyl)-5-methylimidazolidine-2,4-dione (CAS 1008930-80-0)
- 4-(2-Fluorophenyl)dihydro-2h-pyran-2,6(3h)-dione (CAS 1267275-37-5)
Recommended Standards
- 4-Fluoro-2-(1H-1,2,3,4-tetrazol-1-yl)benzoic acid (CAS 951626-72-5)
- 2-methoxycarbonyl-4H-furo[3,2-b]pyrrole-5-carboxylate (CAS 2384395-80-4)
- 4-Fluoro-3-formyl-1H-indazole-6-carboxylic acid (CAS 885521-73-3)
- 2-Fluoro-3-methoxy-1-methyl-4-(trifluoromethyl)benzene (CAS 2386519-70-4)
- 3,4-Dichloro-N-(2,4-diaminoquinazolin-6-yl)benzamide (CAS 55096-68-9)
- 7,9-Difluoro-2,3,4,5-tetrahydro-2,5-methanobenzo[f][1,4]oxazepine (CAS 2857901-94-9)
- Methyl 2-(4-fluoro-2-methoxyphenyl)acetate (CAS 589755-33-9)
- 7-Methylphenazin-1-amine (CAS 18450-15-2)
- 4-Methyl-N-phenylpyrimidin-2-amine (CAS 53112-26-8)
- 3-Methoxyphenethylmagnesium bromide, 0.5M 2-MeTHF (CAS 125159-92-4)
- 5-(5-Ethoxy-4-methyloxazol-2-yl)pentanal (CAS 133602-43-4)
- Midazolam Impurity 18 (CAS CATO-C4X-150918)
- 5-(4-Ethylpiperazin-1-yl)-1,3,4-thiadiazol-2-amine (CAS 902938-93-6)
- Autoinducing Peptide I trifluoroacetate salt (CAS 200010-29-3)
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