Methyl 7-bromo-3-oxo-3,4-dihydroquinoxaline-2-carboxylate CAS 221167-40-4
| CAS No. | 221167-40-4 |
| Molecular Formula | C10H7BrN2O3 |
| Molecular Weight | 283.08 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Methyl 7-bromo-3-oxo-3,4-dihydroquinoxaline-2-carboxylate (CAS 221167-40-4) is a high-purity analytical reference standard with the molecular formula C10H7BrN2O3 and a molecular weight of 283.08 g/mol.
Structurally, Methyl 7-bromo-3-oxo-3,4-dihydroquinoxaline-2-carboxylate (C10H7BrN2O3) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, bromine substitution. The molecule exhibits a degree of unsaturation (DBE) of 8.0, corresponding to approximately 8 ring(s) or double-bond equivalent(s). With a molecular weight of 283.08 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.
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 | C10H7BrN2O3 |
| Molecular Weight | 283.08 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2020 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 2 |
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Recommended Standards
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- Methyl 8-bromo-3-formylimidazo[1,2-a]pyridine-6-carboxylate (CAS 2092515-59-6)
- Methyl 7-chloro-3-methylbenzo[b]thiophene-2-carboxylate (CAS 1415968-75-0)
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- 1-(5-Chlorobenzofuran-2-yl)ethan-1-amine (CAS 147724-81-0)
- 2-Phenyl-2-(p-toluenesulfonyloxy)acetophenone (CAS 1678-43-9)
- Methyl 2-oxo-1,2-dihydroquinoxaline-6-carboxylate (CAS 357637-72-0)
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