Methyl ethyl ketone (MEK), also known as butanone, is a volatile organic compound with the chemical formula C4H8O. It is a colorless liquid with a sweet, acetone-like odor. MEK is a solvent commonly used in industrial and commercial applications. Its excellent solvency properties make it suitable for dissolving a wide range of substances, including resins, adhesives, coatings, and printing inks. MEK is also utilized as a cleaning agent in various industries due to its ability to remove oils, greases, and contaminants from surfaces.

In addition to its role as a solvent, MEK is used as a chemical intermediate in the production of other compounds. It serves as a precursor in the manufacture of plastics, textiles, and paraffin wax. While MEK is an effective solvent, it is important to handle it with care and in well-ventilated areas, as prolonged exposure to high concentrations of MEK vapor can be harmful to human health. Proper safety precautions and ventilation are essential when working with this chemical.