Eosin, also known as eosin, is a peach or pink powder. Eosin (alcohol soluble) has the molecular formula of C₂₀H₈Br₄O₅ and molecular weight of 649.9. Eosin is most suitable for staining with hematoxylin to show the morphology and structure of normal or pathological tissues.

Eosin Staining Solution (Alcohol soluble) is easy to use, does not use mercury, methanol and other toxic reagents, commonly used in tissue sections or cultured cells staining, staining the cell plasma is pink or red.