Chromated Copper Arsenate

Last updated: October 13, 2016

What Does Chromated Copper Arsenate Mean?

Chromated Copper Arsenate (CCA) is a treatment used in the preservation of timber. It is a combination of chromium, copper and arsenic. It has been in production since the 1930s, and is the one of the foremost wood treatments used globally. It is easily recognizable by the green hue that it leeches into the treated timber.

Safeopedia Explains Chromated Copper Arsenate

CCA is added to timber by means of high pressure spraying. It protects the wood from rotting by way of insects and bacterial influences. In most countries it is classified as a restricted use product, and only those who are registered as pesticide applicators have access to this product. In the last 20 years, CCA had been not used in residential wood products in favour of a more “eco-friendly” alternative.


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