Azelaic Acid in Cosmetics

The liquid form of Azelaic Acid you are asking about, specifically "Azelaic Acid (Liquid Azelaic™)", is a special water-soluble derivative known as Potassium azeloyl diglycinate. Unlike regular Azelaic Acid, which is typically not permitted in cosmetics by the FDA due to potential irritation (and is usually found in medicinal products), this modified liquid form is gentler and designed for cosmetic applications.

When registering this product with the FDA, you should use its INCI (International Nomenclature of Cosmetic Ingredients) name, which is Potassium azeloyl diglycinate.