Used as a red food coloring (FD&C Red No. 3) in candies, baked goods, and decorative foods. Commonly found in cake decorations, icing colors, and some fruit-based products. Also used in cosmetics and pharmaceuticals for coloring. In laboratory settings, it acts as a biological stain and a fluorescence quencher. Sometimes used in dental plaque disclosing tablets to visualize plaque buildup on teeth.