Basic Fuchsin is widely used in biological and medical fields as a staining agent. In microbiology, it is a key component of the Ziehl-Neelsen stain, which is essential for identifying acid-fast bacteria like Mycobacterium tuberculosis. It helps in visualizing these bacteria under a microscope by imparting a distinct red or pink color. In histology, it is employed to stain tissues, particularly for highlighting collagen, muscle fibers, and other structures in microscopic studies. Additionally, Basic Fuchsin is used in Schiff's reagent for detecting aldehydes in the Feulgen stain, which is crucial for identifying DNA in cells. Its application extends to the textile industry as a dye for fabrics and in the preparation of inks.