Ethyl 5-{[N-(4-chlorophenyl)benzenesulfonamido]methyl}-4,5-dihydro-1,2-oxazole-3-carboxylate CAS 306978-16-5
| CAS No. | 306978-16-5 |
| Molecular Formula | C19H19ClN2O5S |
| Molecular Weight | 422.88 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Ethyl 5-{[N-(4-chlorophenyl)benzenesulfonamido]methyl}-4,5-dihydro-1,2-oxazole-3-carboxylate (C19H19ClN2O5S) contains a flavonoid core, an amide group, a sulfone 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. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Ethyl 5-{[N-(4-chlorophenyl)benzenesulfonamido]methyl}-4,5-dihydro-1,2-oxazole-3-carboxylate (CAS 306978-16-5), molecular formula C19H19ClN2O5S and molecular weight 422.88 g/mol, is a CATO reference standard with documented purity and traceability.
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 | C19H19ClN2O5S |
| Molecular Weight | 422.88 g/mol |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Recommended Standards
- Ethyl 5-(((4-chloro-N-phenylphenyl)sulfonamido)methyl)-4,5-dihydroisoxazole-3-carboxylate (CAS 306978-14-3)
- (5E)-2-{[(3-chlorophenyl)methyl]amino}-5-{[3-(pyrimidin-2-yloxy)phenyl]methylidene}-4,5-dihydro-1,3-thiazol-4-one (CAS 860789-45-3)
- 1-{3-[(4-chlorobenzenesulfonyl)methyl]-4-nitrobenzoyl}piperidine (CAS 337921-08-1)
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