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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 ]
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]
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.
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 ...
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.
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.
We still don’t know how much of the chemicals actually make their way into the food." And of the amount that does make it into food, only a certain portion will be taken in by the body, Alan says.
Resistance and the harm both to humans and the environment led many governments to curtail DDT use in vector control and agriculture. [13] In 2006 WHO reversed a longstanding policy against DDT by recommending that it be used as an indoor pesticide in regions where malaria is a major problem.