Tetrachloroethylene, also known as perchloroethylene or under the systematic name tetrachloroethene, and abbreviations such as perc (or PERC), and PCE, is a chlorocarbon with the formula Cl₂C=CCl₂. It is a volatile, non-flammable, stable, colorless and dense liquid widely used for dry cleaning of fabrics and as a metal degreasing solvent, formerly as an oral anthelmintic. It has a mildly sweet, sharp odor, detectable by most people at a concentration of 50 ppm.Because of its wide usage, tetrachloroethylene has been extensively assessed as a potential hazard, resulting in government publications about its potential for neurotoxicity and carcinogenesis from chronic or repeated exposure. Improper disposal has caused groundwater pollution.Tetrachloroethylene 99% AR (Analytical Reagent grade) is a high-purity, non-flammable liquid solvent commonly known as Perchloroethylene or PERC. This specific grade is refined to meet stringent laboratory standards, ensuring minimal trace impurities for precise analytical work.