| CAS No. | 5961-32-0 |
| Molecular Formula | C21H18N2O7 |
| Molecular Weight | 410.38 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Compared with other compounds in its class, the molecular weight of 410.38 g/mol gives (E)-4-(3-(Hydroxy(phenyl)methylene)-2-(4-nitrophenyl)-4,5-dioxopyrrolidin-1-yl)butanoic acid distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
(E)-4-(3-(Hydroxy(phenyl)methylene)-2-(4-nitrophenyl)-4,5-dioxopyrrolidin-1-yl)butanoic acid (CAS 5961-32-0) is a high-purity analytical reference standard with the molecular formula C21H18N2O7 and a molecular weight of 410.38 g/mol.
Owing to a flavonoid core, an amide group, a hydroxyl group, an ether linkage, (E)-4-(3-(Hydroxy(phenyl)methylene)-2-(4-nitrophenyl)-4,5-dioxopyrrolidin-1-yl)butanoic acid is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 410.38 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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.
| Molecular Formula | C21H18N2O7 |
| Molecular Weight | 410.38 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°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) | 14.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
| Nitrogen Atoms | 2 |