Used as a dye in various industries, particularly in food, cosmetics, and textiles. In food, it serves as a colorant for candies, beverages, and desserts, providing a vibrant blue hue. In cosmetics, it is added to products like soaps, shampoos, and makeup to enhance their visual appeal. In the medical field, it is employed as a diagnostic agent in lymphangiography to trace lymphatic vessels. Additionally, it is utilized in histology for staining tissues to improve microscopic visualization. Its water-soluble nature makes it suitable for applications requiring even dispersion in liquid solutions.