Calcium hydroxide is widely used in the construction industry as a key component in mortar and plaster. It acts as a binder, improving the workability and durability of these materials. In water treatment, it is employed to adjust pH levels and soften water by removing impurities. The food industry utilizes it as a food additive, known as E526, for purposes like pickling and clarifying sugar. In dentistry, it is used in root canal treatments due to its antibacterial properties and ability to promote healing. Additionally, it plays a role in agriculture as a soil amendment to neutralize acidic soils and improve crop growth.