6,7-Dibromo-2-methylquinoline-5,8-dione CAS 220657-98-7
| CAS No. | 220657-98-7 |
| Molecular Formula | C10H5Br2NO2 |
| Molecular Weight | 330.96 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
6,7-Dibromo-2-methylquinoline-5,8-dione (CAS 220657-98-7), molecular formula C10H5Br2NO2 and molecular weight 330.96 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C10H5Br2NO2, 6,7-Dibromo-2-methylquinoline-5,8-dione contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, bromine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 330.96 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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.
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 | C10H5Br2NO2 |
| Molecular Weight | 330.96 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, faint amine-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; 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 | 1 |
Related Dibromo Standards
- 4,5-Dibromo-2-(pyridin-2-yl)pyridazin-3(2H)-one (CAS 78389-21-6)
- 3,5-Dibromo-4-hydroxybenzenesulfonamide (CAS 31972-12-0)
- 2-(3,5-Dibromo-2-methoxyphenyl)-1H-pyrrole (CAS 10245-82-6)
- 6,8-Dibromo-3-methoxy-2-methylquinoline (CAS 861210-76-6)
- 4,6-Dibromo-2,2-difluoro-1,3-benzodioxol-5-amine (CAS 1037763-48-6)
- 5,6-Dibromo-4-(difluoromethyl)nicotinic acid (CAS 1804446-64-7)
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Recommended Standards
- 2-Bromo-1-(5-iodothiophen-2-yl)ethan-1-one (CAS 34800-30-1)
- 3-Iodo-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-pyridine (CAS 857934-93-1)
- 5-Bromo-4-iodo-2-(methylthio)pyrimidine (CAS 65735-61-7)
- 3,6-Dibromoquinoline-8-carboxylic acid (CAS 2140316-61-4)
- 2-[(3-Chlorophenyl)carbamoyl]phenyl N,N-dimethylsulfamate (CAS 338396-35-3)
- Sodium 2-(5-methyl-1,3-thiazol-2-yl)acetate (CAS 1423030-93-6)
- (3AR,5R,6R,7S,7aR)-5-(hydroxymethyl)-2-methoxy-2-methyltetrahydro-5H-[1,3]dioxolo[4,5-b]pyran-6,7-diol (CAS 138196-19-7)
- D7-Propranolol hydrochloride (CAS 1613439-56-7)
- (S)-1-(4-Ethynylphenyl)ethan-1-ol (CAS 945451-09-2)
- 4-(5-butyl-1,3,4-oxadiazol-2-yl)aniline (CAS 100933-82-2)
- 1-[(4-fluorophenoxy)methyl]-3,5-dimethyl-1h-pyrazol-4-amine (CAS 1006344-04-2)
- 1,2-Dichloro-4-(dichloromethoxy)benzene (CAS 94637-84-0)
- 1’-Boc-2,7-dibromospiro[fluorene-9,4’-piperidine] (CAS 1616113-98-4)
- Peptide Impurity 12 (CAS CATO-CPTD788812)
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