Widely used in the construction industry as a key component in cement, mortar, and concrete. It acts as a filler and binder, enhancing the strength and durability of building materials. In the pharmaceutical industry, it serves as a calcium supplement and antacid to treat conditions like acid reflux and calcium deficiency. It is also utilized in the food industry as a food additive (E170) for fortification, pH regulation, and as a whitening agent in products like bread, cereals, and dairy. In agriculture, it is applied to soil as a liming agent to neutralize acidity and improve crop growth. Additionally, it is a common ingredient in cosmetics, toothpaste, and paper manufacturing, where it acts as a pigment, abrasive, or coating agent.