” Some arsenic trioxide finds its way into your air. Condensation in the vapors on the area at temperatures earlier mentioned 250° C kinds the glassy modification, which slowly and gradually adjustments to the crystalline, monoclinic form. While in the processing of As2O3 the oxide is normally lowered withcarbon: 2As2O3+3C?→As4+3CO2 http://https//chemscenter.com