Rhodium

CAS 7440-16-6RhMetal & Ceramic Science

Rhodium (CAS 7440-16-6, Rh, MW 102.91) is a lustrous, silvery-white, hard, and corrosion-resistant precious metal. It exhibits high reflectivity and excellent thermal and electrical conductivity. Rhodium is primarily employed as a catalyst in automotive catalytic converters and in chemical processing due to its resistance to corrosion and high melting point. It is also used in specialised alloys and plating applications.

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Rhodium (Rh) — chemical element, CAS 7440-16-6; Materials Science, fine chemical supplied by Tech Serve Solutions

Materials ScienceMetal and Ceramic ScienceMetalsRhodium

01 /Applications

Catalysis

Rhodium is a critical component in catalytic converters for vehicles, reducing harmful emissions. It is also extensively used as a catalyst in various chemical synthesis processes.

Alloys

When alloyed with platinum, rhodium enhances hardness and high-temperature strength. These alloys are vital for manufacturing high-performance components and specialised equipment.

Plating

Rhodium plating provides a highly reflective, hard, and tarnish-resistant finish. It is applied to jewellery, electrical contacts, and optical instruments.

Materials Science Research

Its unique properties make rhodium a subject of study in advanced materials science for developing new alloys and functional materials.

02 /Properties

Molecular weight	102.91
Empirical formula	Rh
Assay	99.9% trace metals basis
Form	wire
Boiling point	3727 °C(lit.)
Density	12.41 g/cm3(lit.)
Melting point	1966 °C(lit.)

03 /Safety & handling

GHS hazard pictogram: Flammable (GHS02) — Flammable

Danger

Hazard statements

H228Flammable solid

Precautionary statements

P210Keep away from heat, sparks and open flames. No smoking

Protective equipment	dust mask type N95 (US), Eyeshields, full-face particle respirator type N100 (US), Gloves, respirator cartridge type N100 (US), type P1 (EN143) respirator filter, type P3 (EN 143) respirator cartridges
Water hazard class (WGK, DE)	3
Hazard codes (EU)	F,Xi
Risk statements (R)	11
Safety statements (S)	16-22-24/25

Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.

04 /Identifiers & registry

CAS number

7440-16-6

MDL number

MFCD00011201

05 /Additional specifications

Diam	1.0 mm
Resistivity	4.33 μΩ-cm, 20°C
Thickness	0.025 mm

06 /Quality & supply

Documentation

Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.

Supply & logistics

Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.

07 /Frequently asked questions

What is Rhodium (CAS 7440-16-6) used for?

Rhodium is primarily used as a catalyst, particularly in automotive catalytic converters and chemical synthesis. It is also employed in alloys, plating for a durable and reflective finish, and in materials science research.

What is the CAS number and formula for Rhodium?

The CAS number for Rhodium is 7440-16-6 and its chemical formula is Rh.

What grade and purity does Tech Serve Solutions supply?

Tech Serve Solutions supplies Rhodium with an assay of 99.9% on a trace metals basis. We do not represent this product as USP, BP, EP, or any other pharmacopoeia grade.

How should Rhodium be handled safely?

Rhodium is flammable solid (H228). Handle with appropriate personal protective equipment, including dust masks, eyeshields, gloves, and suitable respirators. Keep away from heat, hot surfaces, sparks, open flames, and other ignition sources. No smoking (P210).

How is Rhodium packed, shipped, and exported?

Tech Serve Solutions handles the packing, shipping, and exporting of Rhodium with careful attention to regulatory compliance and product integrity, ensuring safe transit to your facility.