Used in high-performance spark plugs due to its high melting point and resistance to erosion, ensuring longer service life and reliable ignition in automotive and aerospace engines. Employed in the production of crucibles for growing single crystals, especially in the semiconductor and LED industries, where extreme temperature stability is required. Applied as a coating for electrodes in chlor-alkali processes, enhancing efficiency and durability in corrosive environments. Utilized in radioisotope thermoelectric generators (RTGs) for space missions, where iridium-192 or iridium alloys help contain and protect radioactive materials. Added to platinum alloys to improve hardness and corrosion resistance, used in medical devices, laboratory equipment, and precision instruments. Used in certain catalytic applications, particularly in water oxidation and hydrogen production, supporting research in renewable energy technologies.