![]() ![]() However, wood treated prior to this date can still be used, and CCA-treated wood products continue to be used in industrial applications. As of December 31, 2003, it is illegal to treat dimensional lumber used in residential applications with CCA. Environmental Protection Agency (EPA) reached an agreement with the manufacturers of wood preservative products containing CCA to cancel the registration of CCA for use in virtually all residential applications. manufacturers of arsenical wood preservative began a voluntary transition from CCA to other wood preservatives for certain residential wood products. Wood treated with CCA is known as “pressure treated wood”. Production of wood preservatives, primarily copper chromated arsenate (CCA), accounted for more than 90% of domestic consumption of arsenic trioxide in 2003. Presently, arsenic is widely used in the electronics industry in the form of gallium arsenide and arsine gas as components in semiconductor devices. Īrsenic trioxide may be found in pesticides and defoliants and as a contaminant of moonshine whiskey. herbicides (such as weed killers for telephone and railroad posts and Agent Blue, which was used by U.S.desiccants used in mechanical cotton harvesting,. ![]() However, regulatory restrictions for arsenic, especially for home products, have reduced its use and should also reduce the exposure risk to it. In the past, the United States primarily used arsenic in insecticides such as ant killers and animal dips (the concentrated liquid forms of these are most toxic to humans). ![]() In 2003, the United States was the world’s largest consumer of arsenic. In 2003, the world’s largest producer of arsenic compounds was China, followed by Chile and Peru. There has been no domestic production of arsenic since 1985. ![]()
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