Used as a reagent in organic synthesis, particularly in the preparation of selenium-containing compounds. It serves as a source of nucleophilic selenium in reactions with electrophiles, enabling the formation of carbon–selenium bonds. Commonly applied in the synthesis of selenides and diselenides, which are valuable intermediates in pharmaceuticals and materials science. Also utilized in coordination chemistry as a ligand for transition metal complexes, where it can influence catalytic activity and stability. Its role in radical reactions and as a reducing agent in specific selenium transfer processes enhances its utility in specialized synthetic pathways.