Tetrachloroethene, also known as tetrachloroethylene, perchloroethene or PCE is a colourless liquid industrial chemical that is widely used at dry cleaners, metal finishers and in electronics manufacturing, amongst other industries. PCE is also used in some consumer products and to make other chemicals. PCE is associated with a range of health effects which depend on a number of factors, including how long you have been exposed, how high the concentrations are in air over time and whether you have any other illnesses.