Acetone is the organic compound with the formula (CH3)2CO. This is colorless, mobile, flammable liquid. Acetone is miscible with water and serves as an important solvent in its own right, typically as the solvent of choice for cleaning purposes in the laboratory. Familiar household uses of acetone are as the active ingredient in nail polsih remover and as paint thinner and sanitary cleaner/nail polish remover base. It is a common building block in organic chemistry.