Description

Calcium carbonate is a chemical compound with the chemical formula CaCO3. It is a common substance found in rock in all parts of the world, and is the main component of shells of marine organisms, snails, pearls, and eggshells. Calcium carbonate is the active ingredient in agricultural lime, and is usually the principal cause of hard water. It is commonly used medicinally as a calcium supplement or as an antacid, but excessive consumption can be hazardous. Properties: white powder. Insipidity, odourless. Melting ordm ***9 &, Have two kinds of amorphous and crystalline form, can be divided into the shape of crystallization and six FangJing FangJing inclined, columnar or a diamond. Insoluble in water and alcohol. Dissolve acid, and release of carbon dioxide, a exothermic reaction. Also in chloride solution. In the air in the stable, slight moisture absorption ability.