| CAS No. | 7621-81-0 |
| Molecular Formula | C5H10N2O4 |
| Molecular Weight | 162.14 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
4-(2-Nitrobenzylidene)-2-phenyloxazol-5(4H)-one (CAS 7621-81-0) is a high-purity analytical reference standard with the molecular formula C5H10N2O4 and a molecular weight of 162.14 g/mol.
Structurally, 4-(2-Nitrobenzylidene)-2-phenyloxazol-5(4H)-one (C5H10N2O4) contains a carbohydrate-derived structure, an amide group. The molecule exhibits a degree of unsaturation (DBE) of 2.0, corresponding to approximately 2 ring(s) or double-bond equivalent(s). With a molecular weight of 162.14 g/mol, it falls into the medium-molecular-weight range. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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.
As a certified reference material (CRM), 4-(2-Nitrobenzylidene)-2-phenyloxazol-5(4H)-one meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
| Molecular Formula | C5H10N2O4 |
| Molecular Weight | 162.14 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 2.0 |
| CAS Registry Year (est.) | 1959 |
| Nitrogen Atoms | 2 |