What it is
Tropolone is a seven-membered aromatic ring compound bearing a hydroxyl and a ketone group, giving it the ability to bind metal ions. In cosmetic formulations it is used at low levels to help protect the product, working through its metal-chelating and antimicrobial properties. Its chelating action can also contribute to overall formula stability.
Safety & warnings
Tropolone is used at very low concentrations as a functional additive. As with other preservatives, it should be used within established formulation limits; tolerability at cosmetic use levels is generally acceptable.
Origin & sourcing
Tropolone occurs naturally in some plants and microorganisms but the cosmetic grade is typically produced synthetically.
Questions everyone asks
What does tropolone do in a cosmetic formula?
It acts as a preservative and metal chelator, helping protect the product and support its stability.
Is tropolone a natural ingredient?
It occurs naturally in some plants, but the grade used in cosmetics is usually made synthetically.