3-Bromo-7-methoxy-4-methyl-2h-chromen-2-one CAS 75908-67-7
| CAS No. | 75908-67-7 |
| Molecular Formula | C11H9BrO3 |
| Molecular Weight | 269.09 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 269.09 g/mol gives 3-Bromo-7-methoxy-4-methyl-2h-chromen-2-one distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
3-Bromo-7-methoxy-4-methyl-2h-chromen-2-one (CAS 75908-67-7), molecular formula C11H9BrO3 and molecular weight 269.09 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 3-Bromo-7-methoxy-4-methyl-2h-chromen-2-one (C11H9BrO3) is characterized by a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution, an aromatic ring system. In reversed-phase chromatography, its retention is governed primarily by its high hydrophobicity (logP), which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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.
CATO manufactures 3-Bromo-7-methoxy-4-methyl-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 | C11H9BrO3 |
| Molecular Weight | 269.09 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 sealed and dry, keep tightly closed to prevent evaporation |
| 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.) | 1978 |
| Halogen Content | Br-containing |
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