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1-(2,3-dichlorophenyl)ethan-1-one; CAS No.: 56041-57-7;1-(2,3-dichlorophenyl)ethan-1-one. PROPERTIES: 1-(2,3-dichlorophenyl)ethan-1-one is a chlorinated aromatic ketone with molecular formula C9H7Cl2O. It typically exists as a colorless to pale yellow liquid with a boiling point around 160-165 C. The compound has limited water solubility but dissolves well in organic solvents like dichloromethane or acetone. It exhibits moderate thermal stability but may decompose when exposed to high temperatures or strong bases, releasing toxic chlorine-containing fumes. Proper storage involves keeping it in tightly sealed containers below 30 C, away from heat sources and incompatible materials. APPLICATIONS: In organic synthesis, this compound serves as a versatile building block for creating complex aromatic systems. The dichlorophenyl group provides structural diversity for optimizing biological activity, while the ketone functionality enables nucleophilic addition reactions (The Journal of Organic Chemistry). In pharmaceutical development, 1-(2,3-dichlorophenyl)ethan-1-one contributes to the synthesis of antimicrobial and anticancer agents where the chlorinated aromatic scaffold enhances binding to biological targets (Journal of Medicinal Chemistry). The compound also finds application in materials science as a precursor for creating organic semiconductors with tailored electronic properties, where its electron-withdrawing chloro groups modulate charge transport characteristics (Advanced Materials).