Used in molecular biology for RNA labeling and tracking due to its photoactivatable properties. When exposed to UV light, it forms covalent bonds with nearby RNA or interacting proteins, enabling the study of RNA-protein interactions and RNA dynamics in live cells. Commonly applied in photo-crosslinking experiments to capture transient RNA interactions. Also utilized in metabolic labeling of newly synthesized RNA to monitor gene expression changes with high temporal resolution. Its fluorine and sulfur modifications enhance stability and detection sensitivity.