A colorless crystalline stable that is extremely toxic (0.one g will be a lethal dose). Examination on the stable and vapor states suggests a dimerized construction of As4O6. While in the processing of As2O3 the oxide is Generally diminished withcarbon: 2As2O3+3C?→As4+3CO2 The reaction is endothermic and is also carried out at 500–800℃.The