Tetrachlorethylene

Tetrachlorethylene, also known as perchloroethylene or PCE, is a colorless liquid with a characteristic odor. It is a non-flammable solvent and is widely used in dry cleaning and metal degreasing. Its chemical formula is C2Cl4. Tetrachlorethylene is produced industrially by the chlorination of hydrocarbons. It is a volatile organic compound.

Due to its solvent properties, tetrachlorethylene is effective at removing oils, greases, and other organic materials from fabrics and metals. In the dry cleaning industry, it is the most commonly used solvent. It is also employed in the manufacture of other chemicals and as a component in some brake cleaners and automotive products. Historically, it has also been used as a deworming agent, though this application is now less common.

Exposure to tetrachlorethylene can occur through inhalation, skin contact, or ingestion. It is considered a hazardous substance and can cause adverse health effects, including dizziness, headaches, and skin irritation. Long-term or high-level exposure has been linked to more serious health concerns, including potential carcinogenic effects. Environmental concerns include its persistence in groundwater and potential for contamination. Regulations are in place in many regions to limit its use and emission.