1-(2-Bromo-5-methoxyphenyl)-2,3-butadien-1-one CAS 1801853-67-7
| CAS No. | 1801853-67-7 |
| Molecular Formula | C11H9BrO2 |
| Molecular Weight | 253.09 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
1-(2-Bromo-5-methoxyphenyl)-2,3-butadien-1-one (CAS 1801853-67-7), molecular formula C11H9BrO2 and molecular weight 253.09 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C11H9BrO2, 1-(2-Bromo-5-methoxyphenyl)-2,3-butadien-1-one contains a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 253.09 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C11H9BrO2 |
| Molecular Weight | 253.09 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 tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| 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.) | 1995 |
| Halogen Content | Br-containing |
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Recommended Standards
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- 1-Fluoro-3,3-dimethyl-1,2-benziodoxole (CAS 1391728-13-4)
- 4-Chloro-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)indolin-2-one (CAS 2818961-68-9)
- 2-(Thiophen-2-ylmethyl)benzoic acid (CAS 62636-87-7)
- 3-(2,2-Difluorocyclopropyl)propanoic acid (CAS 1955499-07-6)
- 1-(4-Chlorophenyl)hexan-1-one (CAS 7295-50-3)
- Pyridoxine Impurity 10 (CAS 883-84-1)
- Des-[Gly]31-Semaglutide(x TFA Salt) (CAS 873874-39-6(free base))
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