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Rhodium(III) oxide
CAS no: 12036-35-0 Formula: Rh2O3 Molecular weight: 253.809
Physical Data
Appearance: Gray hexagonal crystals
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Melting point: 1100°C (decompose)
Boiling point: -
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Density: 8.2 g/cm3
Solubility: -
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Thermodynamic Data
Enthalpy of formation: -343 kJ/mol
Gibbs energy of formation: -
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Entropy: -
Heat capacity: 103.8 J/mol K
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Production and preparation
Can be prepared by heating rhodium metal in oxygen at 600°C. Alternatively, the dark-grey oxide will also form by simply heating
rhodium(III) nitrate.
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Behavior and Chemical Properties
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History and Uses
Use in catalytic convertor in automobiles. It is also used as industrial catalysts in manufacturing of chemical intermediates such as
oxo-alcohols, as well as nitric acid and ethanoic (acetic) acid productions.
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Hazard, Storage and Handling
May cause eye or skin irritation, although no detail health hazard information is available.
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(Last update: January 2005) |
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