Quinoline yellow is widely used as a synthetic food dye, particularly in beverages, candies, and desserts, to impart a bright yellow color. It is also employed in the cosmetic industry for coloring products like lipsticks, eyeshadows, and shampoos. In pharmaceuticals, it serves as a coloring agent in tablets and capsules to enhance visual appeal and brand recognition. Additionally, it finds application in the textile industry for dyeing fabrics and in the production of inks for printing. Its vibrant hue and stability make it a popular choice across various industries.