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Rhodium Powder

Rhodium Powder

Rhodium Powder
Product No NRE-8039
CAS No. 7440-16-6
Formula  Rh
Molecular Weight 102.91 g/mol
APS <40 µm (can be customized)
Purity 99.9%
Color black
Density 12.41g/cm3
Melting Point 1966 °C
Boiling Point 3727 °C

Rhodium Powder

Metallic rhodium is shiny white and silvery. Rhodium has a higher melting point and lower density than platinum. It is highly reflective, tough and durable. When heated, it turns into a red oxide and at higher temperatures it turns back into an element. Rhodium does not work in air and water up to 600 C. It is insoluble in most acids, including aqua regia, but dissolves in hot concentrated sulfuric acid and is destroyed by molten alkalis.

Most of the metal (85%) goes to car catalytic converters. This metal is mainly used in alloys with platinum and iridium, which provide greater heat resistance and resistance to oxidation. These alloys are used in furnace windings, nibs, phonograph needles, high temperature thermocouples and resistance wires, aircraft spark plug electrodes, bearings and electrical contacts.

The metal itself is used to coat jewelry and spotlight reflectors due to its luster and tarnish resistance,

It is also a very useful catalyst in numerous industrial processes such as the BP-Monsanto process.

Rhodium, along with ruthenium, palladium, osmium, iridium, and platinum, form a group of elements called platinum group metals (PGMs).