Dehydroacetic Acid ●
TL;DR. This ingredient is used as a preservative, especially for control of yeast and mold in water-containing formulas. It is often paired with other preservative types to broaden bacterial coverage.
What does Dehydroacetic Acid do in a cosmetic formula?
This ingredient is used as a preservative, especially for control of yeast and mold in water-containing formulas. It is often paired with other preservative types to broaden bacterial coverage.
Is Dehydroacetic Acid clean?
Clean-beauty frameworks generally treat it as an acceptable preservative when used within regulatory limits, with low sensitization concern compared with many fragrance allergens. The main caveat is that it is a synthetic preservative with concentration limits and some irritation potential at higher exposure levels.
Is Dehydroacetic Acid sustainable?
This material is typically synthetically produced rather than directly plant-derived. It is used at low levels and is not known for major persistence or bioaccumulation concerns, but it is not a standout renewable-feedstock ingredient.
Is Dehydroacetic Acid COSMOS-approved?
It is permitted under COSMOS as an allowed preservative for natural and organic cosmetics when it meets the standard’s conditions. From a Green Chemistry view, it scores reasonably on low use level and preservative efficiency, but less strongly on renewable sourcing.
How does Dehydroacetic Acid work chemically?
The molecule is a weak organic acid with a heterocyclic ring and beta-dicarbonyl character, and its preservative performance is strongest in acidic systems where more of it remains undissociated. Typical cosmetic use is up to 0.6% as acid under EU rules, with best performance commonly in formulas around pH 6 or below and with co-preservatives for broader coverage.
Last updated 2026-05-13