Used in steel manufacturing to remove impurities during the basic oxygen process. Commonly applied in water treatment to adjust pH and soften water by precipitating impurities. Serves as a key ingredient in cement and mortar for construction due to its binding properties when mixed with water. Utilized in flue gas desulfurization to reduce sulfur dioxide emissions from power plants. Employed in the production of paper and pulp to regenerate sodium hydroxide in the kraft process. Acts as a soil stabilizer in agriculture and civil engineering by reducing acidity and absorbing moisture.