7-Aminocoumarin is widely used as a fluorescent dye in biological and chemical research. Its strong fluorescence properties make it valuable for labeling and tracking molecules in various assays. It is often employed in fluorescence microscopy to visualize cellular structures and processes. Additionally, it serves as a key component in the synthesis of more complex fluorescent probes and sensors. In material science, it is utilized in the development of optical brighteners and light-emitting materials. Its ability to absorb and emit light efficiently also makes it useful in studying photophysical and photochemical reactions.