Calcium carbonate (CaCO₃) is a common compound found in nature. It is the main component of limestone, marble, chalk, eggshells, seashells, and coral. Calcium carbonate is a white, odorless, tasteless powder.
Calcium carbonate has a wide variety of industrial, agricultural, and pharmaceutical uses. Some of the most common uses of calcium carbonate include:
- Construction: As a major component of limestone and marble, calcium carbonate is used in the production of building materials such as cement, concrete, and mortar.
- Paper production: Calcium carbonate is used as a filler and coating in paper production. It helps to improve the brightness, opacity, and printability of paper.
- Paints and coatings: Calcium carbonate is used as a filler and extender in paints and coatings. It helps to improve the consistency, opacity, and durability of paints.
- Plastics: Calcium carbonate is used as a filler in plastics. It helps to improve the strength, stiffness, and dimensional stability of plastics.
- Food and agriculture: Calcium carbonate is used as a food additive and animal feed supplement. It is a source of calcium for humans and animals.
- Pharmaceuticals: Calcium carbonate is used as an antacid to relieve heartburn and indigestion. It is also used as a calcium supplement to treat or prevent calcium deficiency.
