Description_x000D_ General description_x000D_ Rhodamine B isothiocyanate (RhBITC) is an organic fluorescence dye and is widely used as a fluorescent tag in a variety of biological applications. RhBITC is adsorbed onto Ag on silica or polystyrene beads. It exhibits not only a strong surface-enhanced Raman scattering (SERS) signal but also a measurable amount of fluorescence. The RhBITC-modified Ag-deposited silica or polystyrene beads disperse well in ethanol. They are also readily coated in water with polyelectrolytes for their further derivatization with biological molecules of interest that can bind to target molecules._x000D_ Application_x000D_ Rhodamine B isothiocyanate is used for the following applications:_x000D_ • Rhodamine isothiocyanate labeling_x000D_ • Rhodamine-labeled synthetic APF_x000D_ • Preparations of protein and fluorescent conjugates_x000D_ • Fluorescent red dye_x000D_ Packaging_x000D_ 1 g in glass bottle_x000D_ 100, 500 mg in glass insert