Tetrabutylammonium dichloroaurate is primarily used in the field of nanotechnology and materials science for the synthesis of gold nanoparticles. Its role as a precursor allows for controlled particle size and shape, which is crucial in applications such as catalysis, electronics, and biomedical imaging. In catalysis, it enhances reaction rates and selectivity in various organic transformations. In electronics, it contributes to the development of conductive inks and coatings for flexible circuits. Additionally, its use in biomedical imaging leverages the unique optical properties of gold nanoparticles for advanced diagnostic techniques. The compound’s stability and solubility in organic solvents make it a versatile choice for these applications.