Methyl ethyl ketone (MEK) is a colorless liquid ketone with the formula CH3C(O)CH2CH3. It is a volatile, flammable liquid with a sharp, sweet odor. MEK is used as a solvent in the manufacture of paints, varnishes, lacquers, and adhesives. It is also used as a degreasing agent and as a cleaning solvent.

MEK is a hazardous chemical and can cause a variety of health problems, including:

* Eye irritation

* Skin irritation

* Respiratory irritation

* Headaches

* Dizziness

* Nausea

* Vomiting

* Central nervous system depression

* Death

MEK can also be harmful to the environment, and it can contribute to smog and ozone depletion.

Because of its hazardous nature, MEK is regulated by a number of laws and regulations. These laws and regulations specify how MEK must be used, stored, and disposed of.