Used primarily as a photoactivatable crosslinking agent in biochemical and molecular biology research. Its main application lies in photoaffinity labeling, where it helps identify and map molecular interactions between proteins, nucleic acids, and small molecule ligands. Upon exposure to UV light, the diazirine group generates highly reactive carbenes that form covalent bonds with nearby molecules, capturing transient or weak interactions that are difficult to study by other methods. This makes it valuable for studying protein-protein interactions, receptor-ligand binding, and the spatial organization of biomolecules in complex systems. It is also employed in the development of probes for mass spectrometry and fluorescence-based assays, enabling precise tracking and identification of biomolecular targets in both in vitro and cellular environments.