Used in bioconjugation for labeling biomolecules such as proteins, peptides, and antibodies due to its reactive NHS ester group that binds efficiently to primary amines. The BDP TMR fluorophore provides strong fluorescence with high photostability, making it ideal for fluorescence imaging, flow cytometry, and cellular tracking applications. Its bright red emission allows for clear detection in complex biological samples with minimal background interference. Commonly used in research settings to study molecular interactions, localization, and dynamics in live and fixed cells.