Tetraamminepalladium(II) dichloride is widely used as a catalyst in various organic synthesis reactions, including hydrogenation. It plays a crucial role in cross-coupling reactions, such as the Heck reaction, Suzuki reaction, and Stille coupling, which are essential for forming carbon-carbon bonds in pharmaceuticals, agrochemicals, and advanced materials. Additionally, it is employed in the preparation of palladium nanoparticles and thin films, which are utilized in electronics, sensors, and catalysis. Its stability and reactivity make it a valuable precursor in the development of coordination compounds and in the study of palladium chemistry.