Sudan Red B is primarily used as a dye in various industrial applications, particularly in coloring non-food products such as oils, waxes, and polishes. It is also employed in the textile industry to impart a vibrant red color to fabrics. Additionally, it finds use in the petroleum industry for dyeing fuels and solvents to distinguish between different grades or types. However, it is important to note that Sudan Red B is not approved for use in food products due to its potential health risks. In laboratories, it is sometimes utilized as a biological stain for microscopic analysis.