Ethyl 2-{4-[2-(4-bromophenyl)-2-oxoethyl]-3-oxo-3,4-dihydroquinoxalin-2-yl}acetate CAS 478041-09-7
| CAS No. | 478041-09-7 |
| Molecular Formula | C20H17BrN2O4 |
| Molecular Weight | 429.26 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Ethyl 2-{4-[2-(4-bromophenyl)-2-oxoethyl]-3-oxo-3,4-dihydroquinoxalin-2-yl}acetate (CAS 478041-09-7), molecular formula C20H17BrN2O4 and molecular weight 429.26 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, Ethyl 2-{4-[2-(4-bromophenyl)-2-oxoethyl]-3-oxo-3,4-dihydroquinoxalin-2-yl}acetate (C20H17BrN2O4) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage, bromine substitution. The molecule exhibits a degree of unsaturation (DBE) of 13.0, corresponding to approximately 13 ring(s) or double-bond equivalent(s). With a molecular weight of 429.26 g/mol, it falls into the moderately-high-molecular-weight range. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), Ethyl 2-{4-[2-(4-bromophenyl)-2-oxoethyl]-3-oxo-3,4-dihydroquinoxalin-2-yl}acetate 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.
Physical & Chemical Properties
| Molecular Formula | C20H17BrN2O4 |
| Molecular Weight | 429.26 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| 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) | 13.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 2 |
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Recommended Standards
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- N-(5-(1-(2,6-Dichlorophenyl)-3-(difluoromethyl)-1H-pyrazol-5-yl)thiazol-2-yl)cyclopropanecarboxamide (CAS 1338247-30-5)
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- 1-(4-((Tetrahydro-2H-pyran-2-yl)oxy)phenyl)ethan-1-one (CAS 16162-69-9)
- 2-((tert-Butoxycarbonyl)amino)-4-iodobenzoic acid (CAS 2138047-71-7)
- n-(4-Iodophenyl)piperidine-1-carboxamide (CAS 60465-18-1)
- 2-[(4-chloro-2-nitrophenyl)sulfanyl]acetic acid (CAS 6375-61-7)
- Dydrogesterone Impurity 21 (CAS CATO-C4X-218321)
- N-Ethyl-1H-pyrrole-2-carboxamide (CAS 156741-80-9)
- Semaglutide Impurity 246 (CAS CATO-C4X-2226246)
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