3-Bromo-5-methoxy-4-(2-propynyloxy)benzaldehyde CAS 143230-65-3
| CAS No. | 143230-65-3 |
| Molecular Formula | C11H9BrO3 |
| Molecular Weight | 269.09 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 3-Bromo-5-methoxy-4-(2-propynyloxy)benzaldehyde.
3-Bromo-5-methoxy-4-(2-propynyloxy)benzaldehyde (CAS 143230-65-3), molecular formula C11H9BrO3 and molecular weight 269.09 g/mol, is a CATO reference standard with documented purity and traceability.
3-Bromo-5-methoxy-4-(2-propynyloxy)benzaldehyde (C11H9BrO3) 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, its high carbon-to-hydrogen ratio confers good lipid solubility, 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | 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.) | 1997 |
| Halogen Content | Br-containing |
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Recommended Standards
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- N-(4-(5-Methyl-1H-1,2,3-triazol-1-yl)phenyl)acetamide (CAS 89779-15-7)
- 6-(3-Bromophenyl)morpholin-2-one (CAS 1823895-44-8)
- Cabotegravir Impurity 12 (CAS CATO-C4X-287612)
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- 2-Phenoxytetrahydropyran (CAS 4203-50-3)
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