This chapter is limited to an outline from the chemistry of arsenic compounds which have possible environmental great importance. A listing of these compounds is given in Desk two-1. During the processing of As2O3 the oxide is normally reduced withcarbon: 2As2O3+3C?→As4+3CO2 The response is endothermic which is completed at 500–800℃.The http://https//chemscenter.com