Description

Rhodium (CAS NO 7440-16-6) is a rare, silvery-white transition metal belonging to the platinum group, prized for its exceptional corrosion resistance, high reflectivity, and catalytic activity. It is a critical material for industrial processes requiring extreme durability and high-temperature stability. This metal is essential for manufacturers in the automotive, chemical, electronics, and jewelry sectors, where its unique properties enable advanced technological applications and premium finishes.

Application

• Automotive Catalysts: A key component in catalytic converters for gasoline and diesel engines, where it facilitates the reduction of nitrogen oxides (NOx) into harmless nitrogen and oxygen.
• Chemical & Petrochemical Catalysis: Used as a catalyst in critical industrial processes, including nitric acid production, acetic acid synthesis via carbonylation, and hydrogenation reactions.
• Electrical Contacts & Electronics: Employed in high-reliability electrical contacts, thermocouples (especially Pt-Rh types), and as a plating material for connectors due to its excellent conductivity and resistance to oxidation.
• Jewelry & Decorative Plating: Provides a hard, tarnish-resistant, and brilliant white finish for high-end jewelry, watches, and optical instruments through electroplating (rhodium flashing).
• Glass Manufacturing: Utilized in the production equipment for fiberglass and flat glass (e.g., display glass) because of its high melting point and resistance to molten glass corrosion.
• Investment & Bullion: Traded as a high-value investment commodity and stored as bullion bars or coins due to its rarity and significant market value.

Basic Information

Product Name	Rhodium
CAS No.	7440-16-6
Molecular Formula	Rh
Molecular Weight	102.90550
Synonyms	Rhodium Metal; Rhodium Black; Rhodium Catalyst; Rhodium Sponge; Rhodium Powder; Rhodium Foil; Rhodium Wire; Platinum Group Metal (PGM)
EINECS	231-125-0

Quality Control

Our rhodium is supplied in various forms (sponge, powder, foil, wire) and purities to meet diverse industrial needs. Quality is assured through rigorous analytical testing, including Inductively Coupled Plasma (ICP) analysis and Atomic Absorption Spectroscopy (AAS), to verify purity and trace impurity levels. We adhere to relevant industry standards and can provide material traceability. A Certificate of Analysis (COA) is available for every batch upon request, detailing specific assay results and physical characteristics.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from incompatible materials. For long-term storage of fine powders or sponge, consider an inert atmosphere to minimize surface oxidation. Keep containers sealed when not in use to prevent contamination.

Specification

Item	Specification
Appearance	Silvery-white metal (form dependent)
Assay (Rh basis)	≥ 99.9% (99.95% & 99.99% available)
Identification	Conforms
Form	Sponge, Powder, Foil, Wire, Tube
Particle Size (Powder)	Customizable (e.g., -100 mesh, -325 mesh)
Impurities (Typical, max.)	Pt, Pd, Ir, Fe, Cu, Pb, Ni as per grade

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.