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Ingredient · INCI reference

Phenylene Bis-Diphenyltriazine

a.k.a. TriAsorB

CAS 55514-22-2

Phenylene Bis-Diphenyltriazine, sold as TriAsorB, is a newer-generation hybrid filter that absorbs across UVB, UVA2, and UVA1. It is approved in the EU up to 5% but is not yet approved in the US, Japan, or Korea. It is photostable, and EWG rates it 1.

Modern organic Next-gen photostable chemical filters. Gen · new hybrid
01 Spectrum coverage UVA1 · UVA2 · UVB
UVB 290–320nm UVB (290–320nm) — covered UVA-II 320–340nm UVA-II (320–340nm) — covered UVA-I 340–400nm UVA-I (340–400nm) — covered
02 Regional approval · max %
JP — — Japan: No data KR — — South Korea: No data EU ✓ 5% Europe: Approved · max 5% US — — United States: No data
03 Safety profile
EWG score
1
Reef-toxic
No
Endocrine disruptor
No
Comedogenicity
0
Reference

Frequently asked questions

What is TriAsorB?

TriAsorB is the trade name for Phenylene Bis-Diphenyltriazine, a newer hybrid UV filter that provides broad-spectrum coverage across UVB, UVA2, and UVA1 in a single ingredient.

Where can I buy sunscreens with Phenylene Bis-Diphenyltriazine?

It is approved only in the EU at present, capped at 5%. It is not yet approved in the US, Japan, or Korea, so availability is limited to EU-market formulas.

Is Phenylene Bis-Diphenyltriazine photostable?

Yes. It is a photostable filter, so it holds its absorption profile during UV exposure rather than degrading on the skin during wear.

Does it cover the long UVA1 range?

Yes. Its spectrum spans UVB, UVA2, and UVA1, which means it contributes to long-UVA protection often linked to skin aging and pigmentation.