Eosin, 2% w/v 500ML

Eosin is tetra bromofluorescein (a substituted xanthene), a red acidic dye and fluorochrome. The dye is very soluble in ethyl alcohol. Eosin, 2% w/v is the most commonly used as counterstain for hematoxylin and it is also used for monochrome staining of bacteria.