Methylene Chloride

This colorless, volatile liquid with a moderately sweet aroma is widely used as a solvent. Although it is not miscible with water, it is miscible with many organic solvents. It is widely used as a paint stripper and a degreaser. In the food industry, it has been used to decaffeinate coffee and tea as well as to prepare extracts of hops and other flavorings.[2] Its volatility has led to its use as an aerosol spray propellant and as a blowing agent for polyurethane foams.

Trichlorethylene

It is a clear non-flammable liquid with a sweet smell. Perhaps the greatest use of TCE has been as a degreaser for metal parts.

Perchloroethylene

Perchloroethylene (also called PCE) is a colorless, nonflammable manmade liquid that evaporates when exposed to air and dissolves slightly in water. . More than 80% of the PCE produced is used in the dry cleaning industr