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Preservative

DEHYDROACETIC ACID

CAS 520-45-6 / 771-03-9 / 16807-48-0
70

Safety score · 0–100

Fine

Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.

A mild preservative effective against yeasts and moulds — often paired with benzyl alcohol in clean-beauty products. EU caps it at 0.6%; well tolerated at this level.

Function

PRESERVATIVE

Skin benefits

  • Effective preservative against mould and yeast
  • Works at low %
  • Stable across pH range
  • Common paraben alternative

Known concerns

  • EU max 0.6% in non-spray products
  • Possible mild skin irritation
  • Limited efficacy alone — usually paired

References

EU

EU CosIng database

European Commission cosmetic ingredient registry: regulatory status, restrictions, authorised functions.

PC

PubChem

U.S. NIH compound data, GHS hazard codes and toxicity literature.

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This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve, so always read the physical product label and consult a healthcare professional for personal concerns.