Tr
Tris-Biphenyl Triazine
Tris-Biphenyl TriazineSPF filter
A newer filter for UVB and shorter UVA that barely breaks down in sunlight — EU-permitted since 2014, never in sprays.
What it does
It’s a UV filter made of fine particles. It only scatters longer UVA, so a sunscreen still needs another filter for full UVA cover. The EU has allowed it up to 10% since 2014, uncoated and not in sprays; its safety review had no data on breathing it in. It isn’t on the US FDA’s list.
The evidence, graded
moderateTris-biphenyl triazine absorbs UVB and the shorter UVA-II band (peak near 310 nm) and scatters longer UVA-I light. It stayed stable under two hours of simulated sunlight. The EU has permitted it up to 10% since 2014, not in sprays and, as a nanomaterial, only uncoated. It is not on the US list of sunscreen actives.EU 2014 · Official Journal of the European Union ↗
Graded per the methodology: strong · moderate · emerging · expert consensus. A weak source on a strong claim gets the weaker label.
Also known as
tinosorb a2b, TBPT
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