Methyl Ethyl Ketone Safety

People use methyl ethyl ketone (MEK) primarily as a surface coating. Synonyms for MEK include 2-butanone; ethyl methyl ketone; and methyl acetone. It exists as a colorless liquid that easily mixes with water. Safety concerns for MEK include flammability and health hazards.

Flammable Hazard

• MEK is extremely dangerous posing an explosion and fire risk.

  The National Fire Association considers MEK a severely flammable material. Both the vapor and the liquid ignite readily, and explosions are possible. Do not use in the vicinity of ignition sources since the vapor can ignite at a distance and the flame can travel back to the liquid source.

Heath Concerns

• Vapors can cause irritation to the eyes, nose and throat.

  Methyl Ethyl Ketone has a moderate health risk. Short term exposure can cause irritation to the nose and throat. The vapor can also cause headaches. Contact with vapors and liquid can irritate the eyes or cause skin to become itchy and red.

  Chronic or long term exposure can result in complications with the central nervous system. However, carcinogenic and reproductive effects have not been determined, as of 2010, and requires further study.

Safety Precautions

• Use MEK in a well ventilated area, preferably with a fume hood. Do not apply it around ignition sources, and have a class B fire extinguisher available. Do not smoke while working with MEK.

  The material safety data sheet recommends the use of personal protective equipment (PPE), which includes a laboratory coat, goggles and gloves. In case of spills and splashes work with MEK close to an emergency shower and eye wash station.