Acid Red 13 is primarily used as a dye in the textile industry for coloring fabrics, particularly wool, silk, and nylon. It is valued for its bright red hue and good fastness properties. Additionally, it finds application in the paper industry for dyeing paper products. In biological research, it can be used as a staining agent for microscopic analysis. The dye is also employed in some cosmetic formulations, such as lipsticks and nail polishes, to provide vibrant color. Its water-soluble nature makes it suitable for use in various aqueous-based applications.