Ammonium hexachlororuthenate(IV) is primarily used in the field of catalysis, where it serves as a precursor for synthesizing ruthenium-based catalysts. These catalysts are essential in various organic transformations, including hydrogenation and oxidation reactions, which are critical in the production of fine chemicals and pharmaceuticals. Additionally, it is employed in the preparation of ruthenium complexes used in electrochemical studies and materials science, particularly in the development of conductive and semiconductive materials. Its role in research and industrial processes highlights its importance in advancing chemical synthesis and material innovation.