Hematoxylin is widely used in histology and pathology for staining tissues to enhance microscopic examination. It is particularly effective in highlighting cell nuclei by binding to nucleic acids, providing a clear contrast when paired with counterstains like eosin. This staining technique, known as H&E staining, is a standard method for diagnosing diseases and studying tissue structures. Additionally, hematoxylin is employed in cytology to analyze cell samples for abnormalities, such as in Pap smears for cervical cancer screening. Its ability to produce consistent and reliable results makes it an essential tool in medical and biological research.