Acid Blue 9 (C.I. 42090)

Acid Blue 9 (C.I. 42090) is a water-soluble anionic dye used to impart a bright blue color. It is widely applied in the food and beverage industry as well as in textiles for its excellent light and heat stability. This dye is known for its high tinctorial strength and good leveling properties, making it suitable for both industrial and consumer applications.