Methylene Chloride (CH2Cl2)
Methylene Chloride (CH2Cl2), CAS 75-09-2, also known as dichloromethane, DCM, or methylene bichloride, is a clear, colorless, non-flammable, volatile liquid with a chloroform-like smell. In the laboratory, it is commonly used as a solvent for organic reactions and to separate or extract organic compounds from aqueous reaction mixtures or solutions.
Examples of industrial uses for methylene chloride include:
- As a solvent for paint removal, metal cleaning, and degreasing
- In the production of pesticides
- As a process solvent in the manufacture of pharmaceuticals
Methylene chloride emits toxic fumes of phosgene when heated, and thus requires controlled handling in a protective work environment. Exposure to methylene chloride may cause irritation to eyes, skin, and the central nervous system. Exposure to high concentrations of the chemical leads to headache, nausea, and vomiting. The chemical should be handled in a fume hood and in a well-ventilated environment to reduce inhalation exposure. Proper personal protective equipment (PPE), including eye protection, gloves, and body protection, should be worn at all times.