FD Eosin Y Solution™, made up of eosin Y certified by the BIOLOGICAL STAIN COMMISSION and with a step by step user manual printed on the bottle, is specifically designed for easy use in all types of laboratories. Eosin Y imparts various shades of red color to acidophilic tissue elements such as cytoplasm, collagen, and erythrocytes. This solution is excellent for use in combination with hematoxylin stain.