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Rhodium
High Purity Rhodium Sponge for advanced applications
Rhodium sponge is a porous metallic form with a purity of 99.90%, recovered from platinum group concentrates and refined through repeated precipitation. It is the scarcest of the traded platinum group metals and is used almost entirely in catalysis and in coatings that need a bright, hard, tarnish-free surface.
Available forms
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Sponge
Chemical composition
| Element | Symbol | Typical Max Content |
|---|---|---|
| Rhodium | Rh | ≥ 99.90% |
| Platinum | Pt | ≤ 300 ppm |
| Palladium | Pd | ≤ 200 ppm |
| Iridium | Ir | ≤ 150 ppm |
| Ruthenium | Ru | ≤ 100 ppm |
| Gold | Au | ≤ 50 ppm |
| Silver | Ag | ≤ 50 ppm |
| Copper | Cu | ≤ 30 ppm |
| Iron | Fe | ≤ 50 ppm |
| Nickel | Ni | ≤ 20 ppm |
| Lead | Pb | ≤ 10 ppm |
| Silicon | Si | ≤ 20 ppm |
| Tin | Sn | ≤ 10 ppm |
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