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Acriflavine hydrochloride is a fluorescent dye. It is used as a topical contrast agent. It mainly stains nuclei and is applied to tissues before microscopy.
A 1403 (OTTO) Acriflavine hydrochloride (fluoroscence grade) - used in the confocal laser endomicroscopy to check the crypt structure in mucosa. It has also been used in Neurospora strain selection by checking the acriflavine resistance.