... , building material,environmental,feed and pharmaceutical 1.Specification of Light Magnesium Oxide 65% ITEM RESULTPURITY (MgO) 60.00% - 65.00 %SiO2 ... .80 % Other Materials 23.0 co%2.Main Application:Light magnesium oxide is mainly used for preparation offertilizer , ceramics, enamel, refractory ... advance payment5.Our products have high quality and best price. magnesium oxide powder