Synonyms: 9-(2-Carboxyphenyl)-3,6-bis(diethylamino)xanthylium chloride Description Rhodamine B is a classic xanthene‑based fluorescent dye (molecular formula C₈H₃₁ClN₂O₃, molecular weight ~479.02 g/mol) widely used in biological, environmental, and chemical research. This reagent‑grade powder from...