... 2.widely used 3.different grades 4, high quality Magnesium oxide is bending, pressure, high intensity, gas hard, cementitious material, widely ... oxide. Magnesium oxide is making firecrackers firecrackers special materials. Magnesium oxide (MgO) commonly known as magnesite, calcined powder, magnesium oxide powder. Density of 2.94, a white powder ... -33-53-53-53-53-53-53-53-5 Magnesium oxide