E528 - Magnesium hydroxide

Magnesium hydroxide is the inorganic compound with the chemical formula Mg-OH-2. It occurs in nature as the mineral brucite. It is a white solid with low solubility in water -Ksp = 5.61×10−12-. Magnesium hydroxide is a common component of antacids, such as milk of magnesia, as well as laxatives. - Wikipedia