8-Bromo-2H-chromen-2-one CAS 33491-30-4
| CAS No. | 33491-30-4 |
| Molecular Formula | C9H5BrO2 |
| Molecular Weight | 225.04 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
8-Bromo-2H-chromen-2-one (CAS 33491-30-4) is a high-purity analytical reference standard with the molecular formula C9H5BrO2 and a molecular weight of 225.04 g/mol.
Structurally, 8-Bromo-2H-chromen-2-one (C9H5BrO2) contains a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 7.0, corresponding to approximately 7 ring(s) or double-bond equivalent(s). With a molecular weight of 225.04 g/mol, it falls into the medium-molecular-weight range. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
CATO manufactures 8-Bromo-2H-chromen-2-one under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C9H5BrO2 |
| Molecular Weight | 225.04 g/mol |
| Appearance | Off-white to pale 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 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.) | 1966 |
| Halogen Content | Br-containing |
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- 3-Bromothieno[2,3-d]pyridazin-4(5H)-one (CAS 1433203-93-0)
- tert-butyl 3-[(chlorosulfonyl)methyl]-3-fluoroazetidine-1-carboxylate (CAS 1803604-30-9)
- Methyl 2-[(2S)-2-{[(tert-butoxy)carbonyl]amino}-4-methylpentanamido]acetate (CAS 27610-07-7)
- 1-(2-(1H-Pyrrol-1-yl)phenoxy)-3-(isopropylamino)propan-2-ol hemifumarate (CAS 55050-95-8)
- Tert-butyl 4-(((2-nitrophenyl)amino)methyl)piperidine-1-carboxylate (CAS 1233953-16-6)
- 2-(Diethylamino)ethyl 1-(4-nitrophenyl)cyclopentane-1-carboxylate (CAS 135569-16-3)
- Semaglutide impurity 76 (CAS CATO-C4X-222676)
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