CalciumcarbonatFüllstoffe

Calcium carbonate is an inorganic compound with the chemical formula CaCO₃. It is a common substance found in nature, primarily as the mineral calcite and, less commonly, as the minerals aragonite and vaterite. These minerals are the main components of limestone, chalk, marble, and other sedimentary rocks. Calcium carbonate is also a key component of eggshells, seashells, and the skeletons of many marine organisms, such as corals and mollusks.

The compound is widely used in various industrial, medical, and environmental applications. In construction, it serves as a building material and as an additive to cement and mortar to improve workability and strength. In agriculture, finely ground calcium carbonate is applied to soils to neutralize acidity and provide essential calcium for plant growth. It is also used as a dietary supplement to prevent or treat calcium deficiencies in humans and animals.

Chemically, calcium carbonate is a white, odorless powder that is insoluble in water but dissolves in acids, releasing carbon dioxide. It decomposes at high temperatures into calcium oxide (quicklime) and carbon dioxide, a reaction that is the basis for its use in lime production. This property is also exploited in the production of cement and glass.

In environmental applications, calcium carbonate is used as a water treatment agent to remove impurities and adjust pH levels. It is also employed in flue-gas desulfurization processes to capture sulfur dioxide emissions from power plants, helping to mitigate air pollution.

The compound is generally considered safe for most uses, though excessive ingestion can lead to digestive issues or, in rare cases, more serious health problems. Proper handling and storage are recommended to avoid contamination or inhalation of dust.