Magnesium Oxide in Powder Form is a high pH controller and is used in agricultural industry. The Magnesium Oxide is formed by decomposing magnesium carbonate at high temperatures, which is known as calcining. The Magnesium Oxide is used in refractory and construction material ingredient and is also used in animal feed industry. The Magnesium Oxide in Powder Form is a white powder and is partly soluble in water.