Sudan IV is widely used as a dye in various industries, particularly for coloring non-polar substances like oils, waxes, and fuels. In biological research, it serves as a lipid stain to identify fats and lipids in tissues during microscopy studies. It is also employed in the petroleum industry to differentiate between hydrocarbon types. However, its use in food products is strictly prohibited due to its carcinogenic properties. Despite its utility, handling requires caution due to potential health risks.