Used as a reagent in organic synthesis, particularly in the preparation of selenated compounds. It serves as a source of selenium in the formation of carbon–selenium bonds, which are valuable in the development of functional materials and bioactive molecules. Its nitrophenyl group enhances reactivity and can act as a chromophore, making it useful in spectroscopic studies. Applied in the synthesis of selenium-containing heterocycles and in radical reactions where controlled selenium transfer is required. Also explored in the modification of biomolecules for research purposes due to selenium’s unique redox properties.