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Rhodamine 6G is a staining reddish-yellow pigment that has fluorescent properties. It is extremely soluble in both water and alcohol. Fluorescent molecules absorb light at one wavelength and emit light at a longer wavelength.
Rhodamine 6G, like all fluorescent dyes, is not considered permanent, however it is reported to have high stability for a fluorone dye.
Rhodamine 6G is toxic, however it can be biologically inactive and hence non-toxic in a lake pigment form.
Rhodamine dyes are often used for microscopy in the biological sciences.