3-(4-Nitrophenyl)-2-phenyltetrahydrofuro[3,4-d]isoxazol-4(2H)-one CAS 79687-71-1
| CAS No. | 79687-71-1 |
| Molecular Formula | C17H14N2O5 |
| Molecular Weight | 326.30 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
3-(4-Nitrophenyl)-2-phenyltetrahydrofuro[3,4-d]isoxazol-4(2H)-one (CAS 79687-71-1), molecular formula C17H14N2O5 and molecular weight 326.30 g/mol, is a CATO reference standard with documented purity and traceability.
3-(4-Nitrophenyl)-2-phenyltetrahydrofuro[3,4-d]isoxazol-4(2H)-one (C17H14N2O5) contains a flavonoid core, 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).
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 | C17H14N2O5 |
| Molecular Weight | 326.30 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| 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 |
| Degree of Unsaturation (DBE) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1979 |
| Nitrogen Atoms | 2 |
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