Acid Blue 9 - C. I. No. 42090 - Food Blue 2 - Brilliant Blue FCF - FD&C BLUE NO. 1 - greenish-blue color in solution. It has very good resistance to fruit acids, benzoic acid, and sorbic acid. It has fair resistance to light and good resistance to heat. In combination with FD&C Yellow No. 5, it gives a wide range of bright greens. Application: beverages, bakery goods, dessert powders, candy, and confections.