... ,steel-making, environmental,feed and pharmaceutical 1.Specification of Magnesium Oxide Fertilizer grade ITEM RESULTPURITY (MgO) 60.00% - 65.00 %SiO2 8 ... co%2.Main Application:Light magnesium oxide is mainly used for preparation of ceramics, enamel, refractory crucibles , rubber, plastic, wire, cable dyes ... payment5.Our products have high quality and best price. Magnesium Oxide Fertilizer grade