Hematoxylin stain solution is a commonly used histological dye in laboratory settings for the staining of cell nuclei in tissue samples. It is derived from the natural compound hematoxylin, which is extracted from the heartwood of certain trees.

Hematoxylin stain solution is widely employed in histopathology, cytology, and other fields of microscopy to enhance the visibility and contrast of cell nuclei, facilitating the examination and analysis of tissue samples under a microscope.

The staining process with Hematoxylin involves immersing tissue sections or cytology slides into the stain solution. Hematoxylin preferentially binds to the negatively charged components of the cell nuclei, resulting in a dark blue or purple coloration. This allows for clear visualization and differentiation of cell nuclei from other cellular structures and components.