Rhodium

CAS Number: 7440-16-6

Molecular Formula: Rh

About Rhodium

Rhodium (CAS 7440-16-6) remains a critical cornerstone in the US automotive sector for three-way catalytic converters, where its unmatched efficiency in NOx reduction is driving increased demand as a bulk chemical supplier amidst tightening EPA Tier 3 emissions standards. Elemental rhodium, utilized in high-purity fine...

Synonyms

Rhodium
Rhodium 103
Rhodium-103
7440-16-6
Rh

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Rhodium Specifications

CAS Number

7440-16-6

Molecular Formula

Molecular Weight

102.91 g/mol

IUPAC Name

rhodium

Canonical SMILES

[Rh]

InChI Key

MHOVAHRLVXNVSD-UHFFFAOYSA-N

InChI

InChI=1S/Rh

CAS Number

7440-16-6

Molecular Formula

Molecular Weight

102.91 g/mol

IUPAC Name

rhodium

Canonical SMILES

[Rh]

InChI Key

MHOVAHRLVXNVSD-UHFFFAOYSA-N

InChI

InChI=1S/Rh

melting_point

3571 °F (NIOSH, 2024)

boiling_point

6741 °F at 760 mmHg (NIOSH, 2024)

solubility

Insoluble (NIOSH, 2024)

density

12.41 (metal) (NIOSH, 2024) - Denser than water; will sink

Molecular Weight

102.91 g/mol

Catalytic Converter Component

A critical material used in three-way catalytic converters to facilitate the reduction of nitrogen oxides (NOx) into nitrogen and oxygen, as well as the oxidation of carbon monoxide and unburned hydrocarbons in automotive exhaust systems

Chemical Industry Catalyst

A highly efficient catalyst employed in various industrial processes, including the Monsanto process for the carbonylation of methanol to produce acetic acid, hydroformylation of alkenes to aldehydes, and the manufacture of nitric acid

Alloying Agent

A specialized additive used primarily to harden and improve the corrosion resistance of platinum and palladium for the production of furnace windings, bushings for glass fiber manufacturing, thermocouple elements, aircraft spark plug electrodes, and laboratory crucibles

Electroplating and Coating Material

A durable and reflective finish applied to jewelry, optical instruments, headlight reflectors, and electrical contacts to provide exceptional hardness, tarnish resistance, and low electrical resistance

Research and Diagnostic Tool

A functional material used in the fabrication of neutron detectors for nuclear reactors, filters for mammography systems, and as a precursor for radioactive isotopes like palladium-103 in targeted radionuclide therapy for cancer treatment.