β-Naphthol Violet is primarily used as a dye in various industries, particularly in the textile sector for coloring fabrics. Its vibrant hue makes it suitable for dyeing wool, silk, and other natural fibers. In biological and histological studies, it serves as a staining agent to enhance the visibility of tissues and cells under a microscope. Additionally, it is employed in the production of inks and pigments for artistic and printing purposes. Its stability and color intensity also make it a valuable component in the manufacturing of cosmetics, such as lipsticks and eyeshadows.