Fluorescein O,O′-diacrylate (Diacryloyloxyfluoresin) is a fluorescent compound known for its excellent biocompatibility and cellular labeling capabilities. It is frequently utilized in biological imaging and cell tracking studies to effectively mark cells and monitor their dynamic changes within an organism. Fluorescein O,O′-diacrylate is also applied in compound delivery systems to enhance the precision of compound localization and its inhibitory effects. Additionally, it is used in the preparation of polymer materials to improve their optical properties and biological interactions.