Selenic acid solution is primarily used in analytical chemistry as a strong oxidizing agent. It is employed in various chemical reactions where a powerful oxidant is required, such as in the determination of certain metals and organic compounds. In the field of materials science, it is utilized for the surface treatment of metals, enhancing their resistance to corrosion and improving their durability. Additionally, selenic acid solution finds application in the synthesis of selenium-containing compounds, which are important in the production of semiconductors and photovoltaic cells. Its strong acidic properties also make it useful in certain industrial cleaning processes, where it effectively removes oxides and other contaminants from metal surfaces.