Light burned magnesium oxide formula MgO, molecular weight 40.3, white powder, non-toxic, tasteless, insoluble in water and organic solvents, can be dissolved in acid and ammonium salt solution. Scope: with magnesium to form magnesium oxychloride cement, widely used in fire board, ventilation pipes, light wall, Magnesite covers other industries, but also for chemical raw materials, used in ceramics, feed, desulfurization