Application CR,F,CPE,CSM Rubber,Paper filler ,oil paint,Steel ball polishing agent Leather treating agent,glue agent,glass reinforced plastic agent. MgO,%,â?¥ ï¼?92.0 94.0 90.0 96.0 ï¼?Four kinds of purityï¼? Size,um,â?¤ 150 150 150 3.0 According to the value of iodine absorption, magnesium is divided into three types: high activity, medium activity and low activity. The iodine value is 120-180, 50-80 and 19-43mgl2 respectively. We provide high activity magnesium oxide, select raw materials through seawater method, control calcining temperature to control the activity of magnesia, low impurity content and high purity.