Eosin Y is then added to produce a "neutral" dye.

Examples include eosin Y and rose bengal.

Eosin Y is a tetrabromo derivative of fluorescein.

For staining, eosin Y is typically used in concentrations of 1 to 5 percent weight by volume, dissolved in water or ethanol.

Eosin Y stains the superficial epithelial squamous cells, nucleoli, cilia, and red blood cells.

It is a critical component of Papanicolaou stains together with eosin Y and bismarck brown Y. It usually comes as a disodium salt.

Giemsa improved the Romanowsky stain (Eosin Y and Methylene Blue) by stabilizing this dye solution with glycerol.

Field's stain uses methylene blue and Azure 1 dissolved in phosphate buffer solution, and Eosin Y in buffer solution.

The nuclear staining is followed by counterstaining with an aqueous or alcoholic solution of eosin Y, which colors other, eosinophilic structures in various shades of red, pink and orange.

It uses a combination of haematoxylin, Orange G, eosin Y, Light Green SF yellowish, and sometimes Bismarck Brown Y.

Most often used is eosin Y (also known as eosin Y ws or eosin yellowish); it has a very slightly yellowish cast.

In 1891 Dmitry Leonidovich Romanowsky developed techniques using a mixture of Eosin Y and modified Methylene blue that produced a surprising hue unattributable to either staining component: a beautiful, distinctive shade of purple.

If only synthetic Azure B and Eosin Y is used, it may serve as a standardized Giemsa stain; but, without methylene blue, the normal neutrophilic granules tend to overstain and look like toxic granules.

A mixture of eosin Y, methylene blue and demethylated methylene blue (azure B) was later used for a number of different blood film staining procedures (Malachowski stain, Romanowsky stain, Giemsa stain).

Differences between Leishman's and Reuter's methods were: Leishman used methanol (like Jenner) and substituted Eosin B for Eosin Y, whereas Reuter used ethyl alcohol and rightly stressed the importance of using an absolutely pure solvent.

This type of media uses the biochemical characteristics of a microorganism growing in the presence of specific nutrients or indicators (such as neutral red, phenol red, eosin y, or methylene blue) added to the medium to visibly indicate the defining characteristics of a microorganism.