6,8-Dibromo-4-hydroxy-2H-chromen-2-one CAS 288399-84-8
| CAS No. | 288399-84-8 |
| Molecular Formula | C9H4Br2O3 |
| Molecular Weight | 319.93 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
6,8-Dibromo-4-hydroxy-2H-chromen-2-one (CAS 288399-84-8) is a high-purity analytical reference standard with the molecular formula C9H4Br2O3 and a molecular weight of 319.93 g/mol.
6,8-Dibromo-4-hydroxy-2H-chromen-2-one (C9H4Br2O3) contains a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution, an aromatic ring system. 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. 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), 6,8-Dibromo-4-hydroxy-2H-chromen-2-one 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 | C9H4Br2O3 |
| Molecular Weight | 319.93 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Halogen Content | Br-containing |
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Recommended Standards
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- N-benzyl-2,2-dimethylcyclopropane-1-carboxamide (CAS 293761-39-4)
- 2-(1H-Benzo[d]imidazol-2(3H)-ylidene)-1-phenylethanone (CAS 67264-61-3)
- 5-(2,3-Dihydro-1,4-benzodioxin-2-yl)-2,4-dihydro-4-(2-propen-1-yl)-3H-1,2,4-triazole-3-thione (CAS 556018-63-4)
- (R)-2-((tert-Butoxycarbonyl)amino)-2-(3,4-dichlorophenyl)acetic acid (CAS 1241683-86-2)
- 1-(3-((2-Hydroxyethoxy)methyl)pyrrolidin-1-yl)ethanone (CAS 1353980-70-7)
- 4-Acetoxy-1-benzylpiperidine-4-carboxylic acid (CAS 1262988-78-2)
- (Leu31,Pro3?)-Neuropeptide Y (porcine) trifluoroacetate salt (CAS 125580-28-1)
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