BODIPY R6G NHS ester is a chemical compound characterized by the presence of BODIPY (boron dipyrromethene) and Rhodamine 6G structures, combined with an NHS (N-hydroxysuccinimide) ester active group. This composition enables efficient and specific covalent coupling with amino groups on biomolecules such as proteins and nucleic acids, making it suitable for applications in bio-labeling, fluorescence imaging, and biosensing. The compound's unique fluorescent properties allow it to maintain high brightness and stability even in complex biological environments. Its excitation/emission wavelengths are 530 nm and 545 nm, respectively.