Aminopropyl Ascorbyl Phosphate Good Antioxidant Anti-Blemish Dark Spot Fading Aminopropyl Ascorbyl Phosphate at a glance Derivative of l-ascorbic acid (pure vitamin C) Purported to be more stable than l-ascorbic acid Has antioxidant properties Mitigates the visible effects of sun damage Aminopropyl Ascorbyl Phosphate description Aminopropyl ascorbyl phosphate is a water-soluble derivative of vitamin C. Specifically, it is a combination of l-ascorbic acid (pure vitamin C) and 3-aminopropyl dehydrogen phosphate, a molecule purported to enhance the stability of the l-ascorbic acid. Like most forms of vitamin C, aminopropyl ascorbyl phosphate has value for its antioxidant properties (specifically for its ability to scavenge free radicals) as well as its ability to help mitigate the visible effects of sun damage. Extensive studies have not been done yet on the safety of this form of vitamin C as used in cosmetics, though the form of vitamin C it is derived from is considered safe. Usage levels of aminopropyl ascorbyl phosphate range from 0.1–1%. Unlike pure vitamin C, the pH range for this derivative is much broader, giving it greater formulary flexibility. Related ingredients: L-Ascorbic Acid Ascorbic Acid Vitamin C