Sudan II is widely used as a dye in various industries, particularly for coloring non-polar substances like oils, waxes, and solvents. It is commonly employed in the petroleum industry to differentiate between different types of hydrocarbon products. In biological research, Sudan II is utilized as a staining agent to identify lipids and fats in tissues during microscopy studies. Additionally, it is sometimes used in the textile industry for dyeing fabrics, especially those made from synthetic fibers. However, due to its potential health risks, its use in food products is strictly prohibited.