Aminopropyl Ascorbyl Phosphate



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.

Aminopropyl Ascorbyl Phosphate references

  • LotionCrafter, Accessed April 2023, Website
  • SpecialChem, Accessed April 2023, Website
  • Journal of Investigative Dermatology Symposium Proceedings, August 2009, pages 56-59

Peer-reviewed, substantiated scientific research is used to assess ingredients in this dictionary. Regulations regarding constraints, permitted concentration levels and availability vary by country and region.

Ingredient ratings


Proven and supported by independent studies. Outstanding active ingredient for most skin types or concerns.


Necessary to improve a formula's texture, stability, or penetration.


Generally non-irritating but may have aesthetic, stability, or other issues that limit its usefulness.


There is a likelihood of irritation. Risk increases when combined with other problematic ingredients.


May cause irritation, inflammation, dryness, etc. May offer benefit in some capability but overall, proven to do more harm than good.


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Not rated

We have not yet rated this ingredient because we have not had a chance to review the research on it.