Due to its distinct catalytic effects, rhodium is mainly used as a heterogeneous but also as a homogeneous catalyst. Approximately 90% of the annual production of rhodium is used in the automotive industry for exhaust catalytic converters. More than 80 % of the worldwide demand for rhodium in automotive catalytic converters is based on its application as a co-metal to platinum or palladium.
Rhodium (Rh)
| Compound | CAS Number | Formula | Metal Contain. approx. | Color |
|---|---|---|---|---|
| Rhodium acetate | 42204-14-8 | "Rh(OAc)x" | 39 % | brown |
| Rhodium acetate solution | 42204-14-8 / 26105-49-7 | "Rh(OAc)x" | up to 8 % | brown |
| Rhodium(III) chloride hydrate | 20765-98-4 | RhCl3 · n H2O | 38 % | red |
| Rhodium(III) chloride solution | 13569-65-8 | RhCl3 | up to 20 % | red |
| Rhodium(III) nitrate solution | 10139-58-9 | Rh(NO3)3 | up to 13 % | brown |