Arsenic trioxide is the primary product of arsenic smelters. This oxide has immediate apps in sector—e.g., being a glass decolorizing agent. Other commercially valuable natural and inorganic arsenic derivatives are ready from it. A range of apps exploit arsenic's toxicity, including the use in the oxide like a wood preservative. https://zanderwxwvu.wikitron.com/1316900/the_ultimate_guide_to_arsenic_lll_oxide