6-(Dimethylamino)-2-naphthoic acid is primarily used as a fluorescent probe in biochemical and cellular studies. Its fluorescence properties make it valuable for labeling and tracking biomolecules in various research applications. It is often employed in fluorescence microscopy to visualize cellular components or processes due to its ability to emit light upon excitation. Additionally, it can be utilized in the development of sensors for detecting specific ions or molecules in analytical chemistry. Its stability and sensitivity to environmental changes also make it suitable for studying pH variations or interactions within biological systems.