9-Bromo-6H-indolo[2,3-b]quinoxaline CAS 57743-36-9
| CAS No. | 57743-36-9 |
| Molecular Formula | C14H8BrN3 |
| Molecular Weight | 298.14 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
9-Bromo-6H-indolo[2,3-b]quinoxaline (CAS 57743-36-9), molecular formula C14H8BrN3 and molecular weight 298.14 g/mol, is a CATO reference standard with documented purity and traceability.
9-Bromo-6H-indolo[2,3-b]quinoxaline (C14H8BrN3) contains a nitrogen-containing heterocyclic scaffold, a nitrile group, bromine substitution. Halogen substitution raises its density and boiling point, its high carbon-to-hydrogen ratio confers good lipid solubility; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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.
As a certified reference material (CRM), 9-Bromo-6H-indolo[2,3-b]quinoxaline 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 | C14H8BrN3 |
| Molecular Weight | 298.14 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1973 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 3 |
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