3,6-Dibromo-2H-chromen-2-one CAS 58309-97-0
| CAS No. | 58309-97-0 |
| Molecular Formula | C9H4Br2O2 |
| Molecular Weight | 303.93 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
3,6-Dibromo-2H-chromen-2-one (C9H4Br2O2) contains a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution, an aromatic ring system. 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. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
3,6-Dibromo-2H-chromen-2-one (CAS 58309-97-0) is a high-purity analytical reference standard with the molecular formula C9H4Br2O2 and a molecular weight of 303.93 g/mol.
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 | C9H4Br2O2 |
| Molecular Weight | 303.93 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 |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1973 |
| Halogen Content | Br-containing |
Related Dibromo Standards
- 3,6-Dibromo-4H-chromen-4-one (CAS 115237-39-3)
- 3,7-Dibromo-4H-chromen-4-one (CAS 1159978-70-7)
- 3,7-Dibromo-2H-chromen-2-one (CAS 1220702-33-9)
- 4,5-Dibromo-3-fluorothiophene-2-carboxylic acid (CAS 1628447-64-2)
- 2,2-Dibromo-1H-indene-1,3(2H)-dione (CAS 1685-97-8)
- 6,8-Dibromo-2H-chromen-2-one (CAS 21524-15-2)
- 4,7-Dibromo-1H-pyrrolo[3,2-c]pyridine-3-carbaldehyde (CAS 1000341-95-6)
- 6,8-Dibromo-3,4-dihydroquinazolin-4-one (CAS 17518-85-3)
Recommended Standards
- 2,5-Dibromohexanedioic Acid (CAS 3479-85-4)
- dimethyl 2,3-dibromobutanedioate (CAS 51575-86-1)
- Ethane-1,2-diyl bis(2-bromoacetate) (CAS 3785-34-0)
- Dimethyl 2,3-dibromosuccinate (CAS 1186-98-7)
- DL-Lysine Monohydrochloride (CAS 70-53-1)
- N-Methyl-D-Tyrosine Hydrochloride (CAS 2044710-65-6)
- N-(4-Oxo-1-phenyl-1,4-dihydro-5H-pyrazolo[3,4-d]pyrimidin-5-yl)tetrahydrofuran-2-carboxamide (CAS 899996-10-2)
- 2-(3-Aminopyrrolidine-1-carbonyl)-6-methyl-4H,5H-pyrazolo[1,5-a]pyrazin-4-one hydrochloride (CAS 1638612-67-5)
- 6-Chloro-4-(cyclobutylamino)nicotinonitrile (CAS 1956325-80-6)
- 1-Isobutyl-6-oxo-1,6-dihydropyridine-3-carboxylic acid (CAS 939411-30-0)
- 2-(2-Nitrothiophen-3-yl)acetonitrile (CAS 93418-94-1)
- tert-Butyl 4-(2-hydroxypropyl)piperidine-1-carboxylate (CAS 1126084-33-0)
- 4-Chloro-4''-methoxy-[1,1':3',1''-terphenyl]-5'-ol (CAS 115752-50-6)
- Tirzepatide Impurity 14 (CAS CATO-C4X-324014)
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