Avobenzone
parsol 1789 · butyl methoxydibenzoylmethane · hs 1800
A lipophilic UVA filter used in chemical sunscreens to absorb long-wave UV radiation. Systemic absorption exceeds the FDA safety threshold (0.5 ng/mL) after a single application, and avobenzone degrades in sunlight without photostabilizers, reducing its efficacy over the course of the day.
- Verdict
- Caution
02Concerns
- Systemic absorption exceeds FDA safety threshold of 0.5 ng/mL [Inference]
- Photodegrades in UV light — requires photostabilizers to maintain efficacy
- Rare photoallergy reactions reported in clinical literature
- May enhance skin penetration of co-formulated ingredients
03Regulatory flags
- FDA proposed non-GRASE status (2019 — pending further safety testing)
- Degrades under UV exposure; often stabilized with octocrylene
04Commonly found in
Research disclaimer: This rating is based on available peer-reviewed research and regulatory assessments at the time of publication. It is not medical advice. Consult a qualified professional for personal health or skin concerns.
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