Magnesium hydroxide is a chemical compound with the formula Mg(OH)₂. It appears as a white, odorless powder or a colorless liquid and is commonly used as an antacid to relieve heartburn and indigestion. It works by neutralizing stomach acid, providing quick relief from discomfort. In addition to its use in medicine, magnesium hydroxide is also employed in various industrial applications. It serves as a flame retardant, a component in wastewater treatment, and a filler in products like rubber and plastics. Its versatility makes it an important compound in both health and industry.