Magnesium Oxide (MgO), also known as Magnesia, is a white inorganic fine chemical product with high thermal stability and chemical inertness. Classified by activity into light/burned and heavy/dead-burned types, it features good water solubility (with reaction) and alkali property. Widely applied in agriculture, industry, building materials and environmental protection, it acts as a magnesium microelement fertilizer, industrial additive, refractory material and soil conditioner. With stable performance, high purity and customizable activity, it is a versatile basic chemical with broad application prospects.