Aluminum compounds are chemical substances that contain aluminum atoms bonded with other elements. Common examples include aluminum oxide (Al₂O₃), which is used in abrasives and ceramics, and aluminum sulfate (Al₂(SO₄)₃), often used in water purification and as a coagulant in various industrial processes. These compounds are typically white solids and can be found in various forms, such as powders or crystals. These compounds play a significant role in many industries, including construction, pharmaceuticals, and food processing. They are valued for their lightweight properties, resistance to corrosion, and ability to form protective coatings. Additionally, aluminum compounds are essential in the production of aluminum metal through processes like the Bayer process, which extracts aluminum from bauxite ore.