” Some arsenic trioxide finds its way to the air. Condensation on the vapors over a surface at temperatures over 250° C kinds the glassy modification, which little by little modifications for the crystalline, monoclinic sort. Within the processing of As2O3 the oxide is normally lowered withcarbon: 2As2O3+3C?→As4+3CO2 The reaction http://https//chemscenter.com