Applications
Suitable for fluorescent labelling Rhodamine B is used as a laser dye, metal chelating agent and an additive to drugs and cosmetics. It also serves as a staining fluorescent dye, which is used as a colorant in inks, paper and plastics. Further, it is used to make pink fluorescent pigments. It is also employed as a biomarker in oral rabies vaccines for wildlife such as raccoons. In addition to this, it is a useful fluorochrome for histology, fluorescence resonance energy transfer (FRET) and mitochondrial probe.

Solubility
Soluble in water, benzene and ethanol. Slightly soluble in acetone, hydrochloric acid, sodium hydroxide, methyl cellosolve and alcohol.