Benzeneseleninic acid is widely used in organic synthesis as a versatile oxidizing agent. It is particularly effective in the oxidation of alcohols to aldehydes or ketones, offering a mild and selective alternative to harsher reagents. Additionally, it is employed in the synthesis of heterocyclic compounds and plays a role in the preparation of pharmaceuticals and fine chemicals. Its ability to act as a catalyst in various oxidation reactions makes it valuable in the development of complex organic molecules. Furthermore, it is utilized in research for studying reaction mechanisms involving selenium chemistry.