Au solution is widely used in various industries due to its unique properties. In electronics, it is employed for plating connectors and semiconductor components to ensure reliable conductivity and resistance to corrosion. The medical field utilizes it in diagnostic tests, such as lateral flow assays, where it serves as a marker for detecting antibodies or antigens. Additionally, it plays a role in nanotechnology for synthesizing gold nanoparticles, which are applied in drug delivery, cancer therapy, and imaging due to their biocompatibility and optical properties. In catalysis, Au solution is used to create catalysts for chemical reactions, including oxidation processes and environmental remediation. Its stability and effectiveness make it a valuable material in both industrial and scientific applications.