Calcium hydroxide, also known as slaked lime, is a chemical compound with the formula Ca(OH)₂. It is a white, odorless powder that is highly soluble in water, forming a strong alkaline solution called limewater. This compound is commonly used in various applications, including construction, water treatment, and agriculture. In construction, calcium hydroxide is used to make mortar and plaster. In agriculture, it helps to improve soil quality by neutralizing acidity. Additionally, it plays a role in the food industry, where it is used in processes like pickling and as a food additive for certain products.