Check the listing for details. Rhodamine B powder, fluorescent dye 99% 50g. Condition: New. Listed at 15.80 USD. Rhodamine B powder, fluorescent dye 99% 50g Rhodamine B highly fluorescent dye.Rhodamine used as a tracer dye within water to determine the rate and direction of flow and transport.Rhodamine B used extensively in biotechnology applications such as fluorescence microscopy, flow cytometry, fluorescence correlation spectroscopy and ELISA.Rhodamine B is used in biology as a staining fluorescent dye, sometimes in combination with auramine O, as the auramine-rhodamine stain to demonstrate acid-fast organisms.Rhodamine B is tunable around 610 nm when used as a laser dye. Synonym: Basic Violet 10, Brilliant Pink B, Rhodamine O, TetraethylrhodamineMolar mass 479.02 g/molCAS Number 81-88-9Colour Index Number 45170EC Number 201-383-9MDL number MFCD00011931 Formula C28H31N2O3Cl