Ammonium hexachloroosmate(IV) is primarily used in chemical research and laboratory settings as a precursor for the synthesis of other osmium compounds. It serves as a valuable reagent in the preparation of osmium catalysts, which are employed in organic synthesis reactions, including hydrogenation and oxidation processes. Additionally, it is utilized in the field of electrochemistry for the development of electrodes and coatings due to its unique redox properties. In materials science, it contributes to the creation of osmium-containing thin films and coatings with specialized electrical or catalytic properties. Its role in these applications highlights its importance in advancing both industrial and academic research.