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