1, red iron oxide ash 2, model 110#, 130#, 190# 3, manufacture's ISO, SGS, BV approved. Introduction:Iron oxides are chemical compounds composed of iron and oxygen. All together, there are sixteen known iron oxides and oxy-hydroxides.Iron Oxides and oxy-hydroxides are widerspread in natural, play an important role in many geological and biological processes, and are widely tuilized by humans. ...