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Trichloroethylene (TCE) is a halocarbon with the formula C 2 HCl 3, commonly used as an industrial metal degreasing solvent. It is a clear, colourless, non-flammable, volatile liquid with a chloroform -like pleasant mild smell [ 3 ] and sweet taste. [ 9 ]
The U.S. EPA is in the process of evaluating the carcinogenic and non-carcinogenic human health risks from exposure to TCE. [2] Certain uses of TCE were banned in 1977 in the United States. However, TCE was still used in household products such as spot removers and typewriter correction fluid well into the 1990s. [3]
Between 1975 and 1985, the water supply of Marine Corps Base Camp Lejeune was contaminated with trichloroethylene and other volatile organic compounds. [10]In 1986, and later again in 2009, 2 plumes containing trichloroethylene was found on Long Island, New York due to Northrop Grumman's Bethpage factories that worked in conjunction with the United States Navy during the 1930s and 1940s.
Trichloroethylene (TCE) is more aggressive than PCE but is very rarely used today. With superior degreasing properties, it was often used for industrial workwear/overalls cleaning in the past. It is chemically related to tetrachloroethylene. TCE is classified as carcinogenic to humans by the United States Environmental Protection Agency. [12]
Toxic flame retardants can get into black plastic kitchenware and other items because the black plastic used to make them sometimes includes recycled electronic products that contain flame retardants.
Some haloalkanes are still widely used for industrial cleaning, such as methylene chloride (dichloromethane), and as refrigerants, such as R-134a (1,1,1,2-tetrafluoroethane). Haloalkenes have also been used as solvents, including perchloroethylene (Perc, tetrachloroethene), widespread in dry cleaning, and trichloroethylene (TCE, 1,1,2 ...
Bioremediation usually entails reductive dechlorination under anaerobic conditions by Dehalococcoides spp. [38] Under aerobic conditions, degradation may occur via co-metabolism by Pseudomonas sp. [39] Products of biological reductive dechlorination include trichloroethylene, cis-1,2-dichloroethylene, vinyl chloride, ethylene and chloride.
It's probably an overstatement that "[t]he long-term effects of trichloroethylene on human beings are unknown". The health effects of TCE are better understood that most chemicals, and while there's uncertainty concerning the significance of adverse effects at low levels of exposure, that a different point compared to the one stated in the article.