Acetone is the common name for the organic compound propanone or dimethyl ketone. Acetone is a colourless volatile liquid. It is highly combustible. Acetone can be mixed with water and organic solvents. Acetone is frequently used as a cleaning agent and solvent for resins, oils and greases, and as basic material for many syntheses in organic chemistry. In many cases, plasma cleaning is preceded by precleaning with acetone.