Characteristic

Rhodium(III) oxide (or Rhodium sesquioxide) is the inorganic compound with the formula Rh₂O₃. It is a gray solid that is insoluble in ordinary solvents.

Chemical formula:Rh₂O₃

Molar mass: 253.8092 g/mol

Appearance: dark grey odorless powder

Density: 8.20 g/cm³

Melting point: 1,100 °C (2,010 °F; 1,370 K) (decomposes)

Solubility in water:insoluble

Solubility: insoluble in aqua regia

Magnetic susceptibility (χ):+104.0·10⁻⁶ cm³/mol

Crystal structure:hexagonal (corundum)

Application

Rhodium oxides are catalysts for hydroformylation of alkenes, N₂O production from NO, and the hydrogenation of CO.