Used in gold plating and electronics manufacturing as a precursor for depositing thin gold films. Employed in catalysis, particularly in reactions involving oxidation and reduction processes, and as a catalyst in specific chemical reactions requiring high specificity. Serves as a starting material in the synthesis of gold nanoparticles for medical and diagnostic applications, including biosensors, optical materials, and targeted cancer therapy using gold nanoparticles as drug delivery vehicles. It is an efficient gold source that can be easily reduced to metallic gold using reducers such as sodium citrate or ascorbic acid. Commonly used in nanotechnology research. Also utilized in analytical chemistry for gold content determination and in the preparation of other gold-based compounds.