Aluminum hydroxide is a chemical compound with the formula Al(OH)3. It appears as a white, amorphous powder or gel and is commonly used in various applications, including:
1. **Pharmaceuticals**: As an antacid to relieve symptoms of indigestion and heartburn.
2. **Water Treatment**: As a coagulant to remove impurities from water.
3. **Chemical Manufacturing**: As a precursor for aluminum salts and other aluminum compounds.
4. **Fireproofing**: As a flame retardant in plastics and textiles.
It occurs naturally as the mineral gibbsite and is amphoteric, meaning it can react with both acids and bases.