4-Methyl-N-[2-oxo-3-phenyl-2,3-dihydro-4(1H)-quinazolinyliden]benzenesulfonamide CAS 478043-96-8
| CAS No. | 478043-96-8 |
| Molecular Formula | C21H17N3O3S |
| Molecular Weight | 391.44 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
4-Methyl-N-[2-oxo-3-phenyl-2,3-dihydro-4(1H)-quinazolinyliden]benzenesulfonamide (CAS 478043-96-8) is a high-purity analytical reference standard with the molecular formula C21H17N3O3S and a molecular weight of 391.44 g/mol.
Owing to a steroid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, 4-Methyl-N-[2-oxo-3-phenyl-2,3-dihydro-4(1H)-quinazolinyliden]benzenesulfonamide is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 391.44 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C21H17N3O3S |
| Molecular Weight | 391.44 g/mol |
| 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) | 15.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
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