Q: Is Blue #2 Vegan?

A: Possibly.Blue # 2 is name of a food additive dye color.
These dyes comes in various colors. They may be or may not be animal derived.
Different dye colors are made from several different chemical mixtures. Dyes
are certified, water soluble synthetic food colorants. They are manufactured
as powders, granules and liquids. The synthetic dyes are of several types as
per their basic compound and structure. These dyes absorb light and reflect
certain wavelength that is perceived as its color. Dyes have to be certified
for their safety to be used as a food or cosmetic colorant.