Sudan Red 7B is primarily used as a dye in various industrial applications. It is commonly employed in the coloring of plastics, waxes, and oils, providing a vibrant red hue. In the petroleum industry, it serves as a marker dye for identifying and differentiating fuel types. Additionally, it has been utilized in the textile industry for dyeing fabrics, though its use in food and cosmetics is strictly prohibited due to its potential health risks. The dye's stability and intense color make it suitable for applications requiring long-lasting and bright coloration. It is also used in scientific research as a tracer or marker in chemical and biological processes. Proper handling is essential to avoid health and environmental impacts.