2’-Bromo-4’-methoxyacetophenone CAS 89691-67-8
| CAS No. | 89691-67-8 |
| Molecular Formula | C9H9BrO2 |
| Molecular Weight | 229.07 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
2’-Bromo-4’-methoxyacetophenone (CAS 89691-67-8) is a high-purity analytical reference standard with the molecular formula C9H9BrO2 and a molecular weight of 229.07 g/mol.
Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution, an aromatic ring system, 2’-Bromo-4’-methoxyacetophenone is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 229.07 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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).
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 | C9H9BrO2 |
| Molecular Weight | 229.07 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at room temperature, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1982 |
| Halogen Content | Br-containing |
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Recommended Standards
- 2-[(3-bromophenoxy)methyl]oxirane (CAS 5002-98-2)
- 2’-Bromo-5’-methoxyacetophenone (CAS 6342-63-8)
- 2,6-dichloro-3-hydrazinoquinoxaline (CAS 91895-34-0)
- 2-Amino-2-(4-bromophenyl)acetamide (CAS 950651-22-6)
- 1-{[4-Chloro-3-(trifluoromethyl)phenyl]methyl}-2-methylpiperazine (CAS 1240573-35-6)
- 2-(DIisopropylamino)acetamide (CAS 7409-50-9)
- 2,3-Bis(4-ethylphenyl)-5-phenyltetrazolium Chloride (CAS 104497-78-1)
- 5-(4-Fluoro-2-methylbenzyl)-4-methylthiazol-2-amine (CAS 1153775-82-6)
- 1315367-62-4 2-(thiophen-2-ylmethyl)azepane hydrochloride (CAS 1315367-62-4)
- Ethyl 2,4-dioxo-4-(thiazol-2-yl)butanoate (CAS 174139-52-7)
- Ethyl 6-chloroisoquinoline-3-carboxylate (CAS 1823552-72-2)
- Tert-butyl (R)-2-(2-bromoethyl)pyrrolidine-1-carboxylate (CAS 2137092-47-6)
- Oseltamivir EP Impurity H (CAS 814-29-9)
- Semaglutide impurity 61 (CAS CATO-C4X-222661)
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