krómoxid

Chromium(III) oxide, also known as chromic oxide, is an inorganic compound with the chemical formula Cr₂O₃. It is a solid substance that appears as a green powder and is known for its remarkable stability and resistance to heat and corrosion. Chromium(III) oxide is the most common oxide of chromium. It occurs naturally as the mineral eskolaite, which is rare.

This compound is insoluble in water and most acids and alkalis. Its high melting point and chemical inertness make it valuable in various industrial applications. Historically, chromium(III) oxide was used as a pigment in paints, ceramics, and glass due to its vibrant green color and durability. It continues to be employed as a colorant in some applications where high performance is required.

Beyond its use as a pigment, chromium(III) oxide serves as a catalyst in chemical reactions and as an abrasive. It is also used in the production of other chromium compounds. Its ability to withstand extreme temperatures makes it suitable for refractory materials, which are used in furnaces and other high-temperature industrial equipment. The production of chromium(III) oxide typically involves the thermal decomposition of chromium salts or the oxidation of chromium metal.