3-(2-Chlorophenyl)-5-[(E)-2-[(2,4-dimethoxyphenyl)amino]ethenyl]-1,2-oxazole-4-carbonitrile CAS 320424-93-9
| CAS No. | 320424-93-9 |
| Molecular Formula | C20H16ClN3O3 |
| Molecular Weight | 381.81 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
3-(2-Chlorophenyl)-5-[(E)-2-[(2,4-dimethoxyphenyl)amino]ethenyl]-1,2-oxazole-4-carbonitrile (C20H16ClN3O3) contains a steroid core, an amide group, a hydroxyl group, an ether linkage, chlorine substitution. It is notably hygroscopic, halogen substitution raises its density and boiling point, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
3-(2-Chlorophenyl)-5-[(E)-2-[(2,4-dimethoxyphenyl)amino]ethenyl]-1,2-oxazole-4-carbonitrile (CAS 320424-93-9) is a high-purity analytical reference standard with the molecular formula C20H16ClN3O3 and a molecular weight of 381.81 g/mol.
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 | C20H16ClN3O3 |
| Molecular Weight | 381.81 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) | 14.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
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Recommended Standards
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- 4,4'-(1,4-Phenylenebis(ethyne-2,1-diyl))dianiline (CAS 246141-52-6)
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- (E)-{2-[(2-chlorophenyl)methanesulfonyl]-1-(2,4-dichlorophenyl)ethylidene}(methoxy)amine (CAS 338400-69-4)
- 1-Tert-butyl-3,5-dimethyl-1h-pyrazole-4-carboxylic acid (CAS 1017783-64-0)
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