Caco

CaCO is not a recognized standard chemical formula for a stable compound in inorganic or organometallic chemistry. In most contexts, the similarly labeled CaCO3 is used to denote calcium carbonate, and CaCO by itself is likely a typographical error or an incomplete fragment of a larger formula.

Calcium carbonate (CaCO3) is a common mineral compound composed of calcium ions and carbonate groups. It occurs naturally in minerals and rocks such as limestone, chalk, and marble, and it is a major component of eggshells and shells of marine organisms. In nature, CaCO3 exists mainly in the calcite and aragonite crystal forms, with calcite being the most stable at standard conditions.

Physical properties of calcium carbonate include a white or off-white solid at room temperature, relatively high hardness, and low solubility in water. It reacts with acids to release carbon dioxide, a reaction exploited in laboratories and various industrial processes.

Production and uses vary by form. Commercial calcium carbonate is manufactured from limestone or marble through crushing, grinding, and sometimes chemical precipitation or acid treatment. It is widely used as a construction material (as a key component of cement and concrete fillers), in paper production, plastics, paints, and coatings, as a soil conditioner in agriculture, and as an antacid in medicine.

If encountered in text, CaCO most likely refers to CaCO3, calcium carbonate, rather than a distinct compound with formula CaCO. Accurate communication in chemical contexts typically uses CaCO3 for calcium carbonate and avoids the ambiguous CaCO notation.