204218

Rhodium

powder, 99.95% trace metals basis

• Fórmula empírica (Notação de Hill): Rh
• CAS Number: 7440-16-6
• Peso molecular: 102.91
• Número CE: 231-125-0
• Número MDL: MFCD00011201
• Código UNSPSC: 12141738
• ID de substância PubChem: 24852239
• NACRES: NA.23

Propriedades

• Nível de qualidade: 100
• Ensaio: 99.95% trace metals basis
• Formulário: powder
• resistividade: 4.33 μΩ-cm, 20°C
• p.e.: 3727 °C (lit.)
• pf: 1966 °C (lit.)
• densidade: 12.41 g/cm³ (lit.)
• cadeia de caracteres SMILES: [Rh]
• InChI: 1S/Rh
• chave InChI: MHOVAHRLVXNVSD-UHFFFAOYSA-N

Descrição

Descrição geral

Rhodium is one of the rarest metals from the platinum group, found in very small quantities in the earth′s crust (0.2 parts per billion). Rhodium’s chemical properties are related to its unusual ground state valence electron configuration in which it has only one electron in its outermost s orbital. This electron configuration has important implications for its catalytic ability, which has made rhodium useful in catalytic converters for automobiles. At the same time, metallic rhodium is a noble metal, meaning it has outstanding resistance to oxidation.

The powder form of rhodium is a silvery-grey and is used not just in the auto industry, but also in other areas like chemical synthesis and powder metallurgy. Rhodium is harder and melts at higher temperatures than both platinum and palladium, which makes it’s a useful hardening element in alloys. Additionally, it is popular for coating jewelry and other items because it gives a shiny, protective layer that does not easily wear away.

Aplicação

Rhodium can be used in the following applications:

• Rh supported on activated carbon (Rh/C) can be used as an efficient oxygen reduction reaction catalyst for the fabrication of microbial fuel cells.
• Used as a catalyst in the hydrosilylation of aromatic nitriles to N, N-disilylamines.
• Used to prepare Rhodium-Iridium alloy.

Informações de segurança

• Código de classe de armazenamento: 4.1B - Flammable solid hazardous materials
• Classe de risco de água (WGK): nwg
• Ponto de fulgor (°F): Not applicable
• Ponto de fulgor (°C): Not applicable
• Equipamento de proteção individual: Eyeshields, Gloves, type P3 (EN 143) respirator cartridges