methyl ethyl ketone (MEK), also called Butanone, is an organic compound with the formula CH3C(O)CH2CH3. This colorless liquid ketone has a sharp, sweet odor reminiscent of butterscotch and acetone It is produced industrially on a large scale, but occurs in nature only in trace amounts. It is partially soluble in water, and is commonly used as an industrial solvent. It is an isomer of another solvent, tetrahydrofuran.
Methyl ethyl ketone is used in many industries. It is used as a solvent and in the manufacture of synthetic rubber, paraffin wax, and to make other chemical products.