Description

Silver CAS NO 7440-22-4 is a lustrous, white, and highly ductile precious metal with exceptional electrical and thermal conductivity. Its unique combination of chemical stability, catalytic activity, and antimicrobial properties makes it a critical material across advanced industrial and technological sectors. This high-purity elemental silver is essential for manufacturers in the electronics, photovoltaics, catalysis, medical device, and jewelry industries seeking reliable performance and consistent quality.

Application

• Electronics & Electrical Contacts: Used in conductive pastes, thick-film inks, switches, and contacts due to its unparalleled electrical conductivity and oxidation resistance.
• Photovoltaics & Renewable Energy: A key component in photovoltaic cells as a conductive grid material for efficient electron collection.
• Catalysis & Chemical Synthesis: Serves as a catalyst or catalyst support in oxidation reactions, ethylene oxide production, and fine chemical manufacturing.
• Medical & Antimicrobial Applications: Incorporated into wound dressings, coatings for medical devices, and water purification systems for its broad-spectrum biocidal properties.
• Jewelry, Silverware & Decoration: The primary material for sterling silver alloys, decorative plating, and high-value ornamental goods.
• Brazing & Soldering Alloys: Used in high-strength, high-temperature brazing alloys for joining metals in aerospace and heavy industry.
• Mirror & Optical Coatings: Applied as a reflective coating for mirrors, optical instruments, and specialized glass.
• Investment & Bullion: Traded as a store of value and for investment purposes in bar, coin, and grain forms.

Basic Information

Product Name	Silver
CAS No.	7440-22-4
Molecular Formula	Ag
Molecular Weight	107.87 g/mol
Synonyms	Argentum; Silver Metal; Colloidal Silver; Silver Powder; Silver Flake; Silver Grain; Fine Silver; Silver Bullion; Ag; Silver(0); Native Silver; EINECS 231-131-3
EINECS	231-131-3

Quality Control

Our high-purity silver is produced and tested to meet exacting industry standards, including potential specifications for 99.95% (3N5), 99.99% (4N), and 99.999% (5N) grades. Quality is verified through advanced analytical techniques to ensure compliance with customer-specific requirements for electronics, catalysis, and medical applications. A comprehensive Certificate of Analysis (COA) detailing purity and trace metal content is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from incompatible materials such as strong acids, strong oxidizers, and sulfides. For long-term storage of high-purity forms, consider an inert atmosphere to minimize surface oxidation. Maintain ambient temperature conditions (15-25°C).

Specification

Item	Specification
Appearance	Lustrous white metal (powder, grain, wire, bar)
Assay (Ag)	≥ 99.95% / ≥ 99.99% / ≥ 99.999%
Identification (XRF)	Conforms
Trace Metals (ICP-OES/MS)	Contact for details
Oxygen Content	< 50 ppm (for high-purity grades)
Particle Size (for powder forms)	Customizable (e.g., -325 mesh, 1-5 µm)
Surface Area (BET)	Contact for details
Tap Density (for powder forms)	Contact for details

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