Description

Gold CAS NO 7440-57-5 is a precious metal element prized for its exceptional chemical stability, high electrical conductivity, and brilliant luster. Its unique combination of inertness, malleability, and biocompatibility makes it a critical material for advanced technological and industrial applications. This product is essential for manufacturers in the electronics, medical device, catalysis, and decorative coating industries seeking reliable, high-purity material for precision components and processes.

Application

• Electronics & Semiconductor Manufacturing: Used in the production of bonding wires, connectors, and plating for high-reliability electrical contacts due to its superior conductivity and corrosion resistance.
• Medical & Dental Devices: Employed in implants, surgical instruments, and diagnostic components where biocompatibility and long-term stability in the body are paramount.
• Catalysis: Serves as a highly effective catalyst or catalyst support in chemical processes, including vinyl acetate monomer production and automotive emission control systems.
• Decorative & Protective Coatings: Applied via electroplating or physical vapor deposition (PVD) to provide a durable, tarnish-resistant, and aesthetically pleasing finish on jewelry, watches, and luxury items.
• Nanotechnology & Research: Gold nanoparticles and colloids are fundamental in biosensing, drug delivery systems, photothermal therapy, and advanced material science research.
• Aerospace & Defense: Utilized in critical electronic systems, infrared reflectors, and as a lubricant in extreme environments due to its reliability under stress and wide temperature ranges.

Basic Information

Product Name	Gold
CAS No.	7440-57-5
Molecular Formula	Au
Molecular Weight	196.97 g/mol
Synonyms	Gold metal; Aurum; Colloidal Gold; Gold Powder; Gold Flake; Gold Sputtering Target; Gold Wire; Gold Evaporation Source; EINECS 231-165-9

Quality Control

Our Gold is produced and handled under strict quality management protocols to ensure batch-to-batch consistency and high purity. We offer various grades, including high-purity (99.99% and 99.999%) for technical and research applications. Quality is verified through advanced analytical techniques, and a Certificate of Analysis (COA) detailing purity, trace metal analysis, and physical form is provided with each shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from incompatible materials such as strong acids, strong oxidizers, and cyanides. For high-surface-area forms like powder or sponge, store under an inert atmosphere if specified to minimize surface oxidation risk.

Specification

Item	Specification
Appearance	Yellow metal, powder, wire, or ingot as specified
Identification (ICP-OES/XRF)	Conforms
Assay (Au)	≥ 99.9% (99.99% & 99.999% available)
Trace Metals (ICP-MS)	≤ 100 ppm total (Specific limits per grade)
Particle Size (for powder grades)	As per customer requirement (e.g., -325 mesh)

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