UVA sunscreen filter
1-(4-tert-Butylphenyl)-3-(4-methoxyphenyl) propane-1,3-dione / Avobenzone
Safety score · 0–100
Fine
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
Avobenzone is the workhorse UVA sunscreen filter, approved up to 5 percent in EU sunscreens. It is photo-unstable without stabilizers and carries an aquatic chronic hazard, so formulators must stabilize it and consumers rinse off after swimming.
Skin benefits
- Broad UVA filter used worldwide in sunscreens
- Listed in EU Annex VI up to 5 percent
- Critical component of broad-spectrum sun protection
Known concerns
- Photo-unstable on its own; requires stabilizers like octocrylene
- Can produce reactive degradation products under UV exposure
- GHS H413 long-lasting harmful effects to aquatic life
- Rare contact allergy reported
References
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, so always read the physical product label and consult a healthcare professional for personal concerns.