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Chromated copper arsenate (CCA) is a wood preservative containing compounds of chromium, copper, and arsenic, in various proportions. It is used to impregnate timber and other wood products, especially those intended for outdoor use, in order to protect them from attack by microbes and insects .
Sonti Kamesam (1890–30 November 1952) was an Indian timber engineer and scientist who worked at the Forest Research Institute, Dehra Dun. He is best known for his patented wood preservative, ASCU, from the chemical symbols for Arsenic and Copper.
Wood that has been industrially pressure-treated with approved preservative products poses a limited risk to the public and should be disposed of properly. On December 31, 2003, the U.S. wood treatment industry stopped treating residential lumber with arsenic and chromium (chromated copper arsenate, or CCA).
Copper arsenate was a minor compound used in the Egyptian blue pigment used by the ancient Egyptians and Romans. [10] Cobalt violet pigment was made from cobalt arsenate before its toxicity led to its replacement by cobalt phosphate. [11] [12] [13] Chromated copper arsenate (CCA) has been a widely used wood preservative since the 1930s. [14]
Applying preservatives, such as chromated copper arsenate (CCA) or borates, can protect wood from biological and chemical degradation. [6] Coatings, such as paints, varnishes, and water repellents, provide a barrier against moisture and UV radiation. Advanced coatings containing UV stabilizers and biocides offer enhanced protection. [7]
Fred Kobylarz, MD, is co-director of the Center for Healthy Aging at Rutgers Robert Wood Johnson Medical School. ‘Sundowning’ is a term that refers to behavior changes in people with dementia ...
ACQ became a widely used wood preservative after concerns were raised about possible environmental contamination by chromium and arsenic from wood treated with chromated copper arsenate (CCA), through contact (especially in playgrounds), leaching, sawing and sanding, or burning. [9]
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