Eosin bluish 0.5% aqueous staining solution is an important tool in biological and medical research, especially in histology and cytology. Eosin is an acidic dye primarily used to stain basic tissue components such as cytoplasm, collagen fibers and extracellular matrix. These components are usually stained in bright to strong shades of red.

The bluish version of eosin provides a cooler staining hue. This stain can help highlight certain aspects of tissue structure or complement the color image in multiple stains. Eosin bluish 0.5% solution in water is ideal for achieving effective staining of tissue sections and cell preparations.

Eosin bluish 0.5%, dissolved in water, is often used in combination with other staining agents, such as hematoxylin, to provide differentiated visualization of various tissue structures. The combination of eosin and hematoxylin, also known as hematoxylin-eosin staining (HE staining), is one of the most common staining techniques in histology and pathology.