Is ferric ammonium ferrocyanide vegan?

Ferric ammonium ferrocyanide is an inorganic synthetic pigment, also known as Pigment Blue 27, that imparts a deep blue color. It is manufactured industrially through the chemical reaction of iron salts, such as ferrous sulfate, with ferrocyanide compounds and ammonium salts, followed by an oxidation step. This color additive is widely used in personal care items such as eye makeup, lipsticks, and nail polishes, as well as in externally applied pharmaceuticals, dietary supplement coatings, and specialized food packaging materials.

ferric ammonium ferrocyanide is vegan because its production relies entirely on mineral and synthetic chemical sources. The manufacturing process uses strictly inorganic chemical precursors and does not utilize any animal tissues, animal byproducts, or animal-derived processing aids at any stage of synthesis. Because no animal inputs are involved in its creation, the ingredient is entirely free of animal derivatives.