Industrial uses include usage as a precursor to forestry products, in colorless glass production, and in electronics.[9] Being the main compound of arsenic, the trioxide is the precursor to elemental arsenic, arsenic alloys, and arsenidesemiconductors. Bulk arsenic-based compounds sodium arsenite and sodium cacodylate are derived from the trioxide.[citation needed]
A variety of applications exploit arsenic's toxicity, including the use of the oxide as a wood preservative. Copper arsenates,
which are derived from arsenic trioxide, are used on a large scale as a
wood preservative in the U.S. and Malaysia, but such materials are
banned in many parts of the world. This practice remains controversial.[9] In combination with copper(II) acetate, arsenic trioxide gives the vibrant pigment known as Paris green used in paints and as a rodenticide. This application has been discontinued.[citation needed]
https://en.wikipedia.org/wiki/Arsenic_trioxide
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