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1-(4-tert-Butylphenyl)-3-(4-methoxyphenyl) propane-1,3-dione / Avobenzone

CAS 70356-09-1
78

Safety score · 0–100

Fine

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

About

A widely used UVA sunscreen filter approved in the EU at concentrations up to 5%, with an aquatic toxicity concern.

Avobenzone (INN) is one of the most commonly used organic UVA filters worldwide and is approved for cosmetic use in the EU under Regulation (EC) No 1223/2009 with a maximum concentration of 5%. It provides broad-spectrum UV protection by absorbing UVA radiation. The only EU-labeled hazard is H413 (aquatic long-term toxicity), which primarily relates to environmental concern rather than direct human health at approved concentrations.

Skin benefits

  • UVA radiation protection
  • Prevents photoaging
  • Broad-spectrum sunscreening

Known concerns

  • H413: Aquatic long-term toxicity
  • Can degrade into potentially sensitizing products when exposed to UV
  • Requires photostabilizers in formulations

References

EU

EU CosIng database

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

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