Patent Blue VF is widely used in the food industry as a coloring agent, particularly in confectionery, beverages, and desserts, to provide a vibrant blue hue. It is also employed in the pharmaceutical sector to color medications and capsules, enhancing their visual appeal and aiding in product identification. In the cosmetic industry, it is utilized in products like shampoos, soaps, and makeup to achieve desired shades. Additionally, Patent Blue VF serves as a dye in histology and medical diagnostics, where it is used as a tracer in lymphangiography to visualize lymphatic vessels. Its stability and intense color make it a popular choice across these diverse applications.