Magnesium hydroxide has a molar mass of 58.3197 grams per mole. It has the chemical formula Mg(OH)^2 and is commonly known as milk of magnesia because of its milky-white appearance.
Milk of magnesia has extensive uses in medicine, pharmaceuticals and cosmetics. It is often mixed with water and taken as an antacid or a laxative. It is also used as a component in antiperspirants, canker sore medications and heartburn relief and industrially as an acid neutralizer. Use of milk of magnesia may lead to deficiencies in potassium, folic acid or iron, so it is important that users remain under medical supervision when taking it for extended periods.