Direct Scarlet B is a direct azo dye widely used in the textile industry for dyeing cotton, wool, silk, linen, and other natural and cellulose fibers, producing a vibrant red hue with high color fastness and resistance to washing. It is also employed in fabric printing to create attractive patterns and colors. Additionally, it is utilized in the paper industry for coloring paper products, providing consistent shades, and in the leather industry for uniform and durable finishes on leather goods. In scientific laboratories, Direct Scarlet B serves as an indicator or test reagent in chemical reactions due to its sensitivity to environmental changes such as pH or oxidation.