UV Filter
alpha-(2-Oxoborn-3-ylidene)toluene-4-sulphonic acid and its salts
Safety score · 0–100
Fine
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
A camphor-based water-soluble UV filter (benzylidene camphor sulfonic acid) approved in the EU at up to 6%. Generally good safety, though related camphor sunscreens are under regulatory review.
Skin benefits
- EU-approved UV filter (Annex VI entry 17)
- Water-soluble — non-greasy formulation feel
- Allowed up to 6% in EU sunscreens
- Good photostability
Known concerns
- Camphor derivative — endocrine concerns flagged for related 4-MBC
- Some related camphor sunscreens are under EU re-evaluation
- Sensitization potential at high %
References
EU CosIng database
European Commission cosmetic ingredient registry: regulatory status, restrictions, authorised functions.
Related uv filters
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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.