Tetrachloroethylene (CAS 127-18-4)

Tetrachloroethylene (CAS 127-18-4)


Other names: Tetrachloroethylene, Perchloroethene, Perchloroethylene, Perc, PCE

Tetrachloroethylene, also known under the systematic name tetrachloroethene, or perchloroethylene (“perc” or “PERC”), and many other names, is a chlorocarbon with the formula Cl2C=CCl2. It is a colorless liquid widely used for dry cleaning of fabrics, hence it is sometimes called “dry-cleaning fluid”. It has a sweet odor detectable by most people at a concentration of 1 part per million (1 ppm). Worldwide production was about 1 million metric tons (980,000 long tons; 1,100,000 short tons) in 1985.

CAS: 127-18-4

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Tetrachloroethylene is an excellent solvent for organic materials. Otherwise it is volatile, highly stable, and nonflammable. For these reasons, it is widely used in dry cleaning. It is also used to degrease metal parts in the automotive and other metalworking industries, usually as a mixture with other chlorocarbons. It appears in a few consumer products including paint strippers and spot removers.

It is used in neutrino detectors where a neutrino interacts with a neutron in the chlorine atom and converts it to a proton to form argon.