Description

Chromium(III) oxide is the inorganic compound of the formula Cr2O3.
It is one of the principal oxides of chromium and is used as a pigment.
In nature, it occurs as the rare mineral eskolaite.

【Properties】
Chemical formula:Cr2O3
Molar mass:**1.***4 g/mol
Appearance:light to dark green, fine crystals
Density:5.*2 g/cm3
Melting point:2,**5 °C (4,**5 °F; 2,**8 K)
Boiling point:4,**0 °C (7,**0 °F; 4,**0 K)
Solubility:insoluble in water, alcohol, acetone, and acids

【Applications】
Because of its considerable stability, chromia is a commonly used pigment and was originally called viridian.It is used in paints, inks, and glasses. It is the colourant in "chrome green" and "institutional green."

Chromium(III) oxide is a precursor to the magnetic pigment chromium dioxide.
It is one of the materials that are used when polishing (also called stropping) the edges of knives,razors, etc. on a piece of leather, balsa, cloth, or other material.
In this context it is alternatively known as "green compound".