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Ingredient · INCI reference

Diethylhexyl Butamido Triazone

a.k.a. Uvasorb HEB

CAS 154702-15-5

Iscotrizinol (Uvasorb HEB, Diethylhexyl Butamido Triazone) is a newer-generation organic UVB filter that is photostable. It is approved up to 10% in the EU, Japan, and Korea, and is still pending in the US. Safety data is clean, with an EWG score of 1 and no endocrine or reef flags.

Modern organic Next-gen photostable chemical filters. Gen · new organic
01 Spectrum coverage UVB
UVB 290–320nm UVB (290–320nm) — covered UVA-II 320–340nm UVA-II (320–340nm) — not covered UVA-I 340–400nm UVA-I (340–400nm) — not covered
02 Regional approval · max %
JP ✓ 10% Japan: Approved · max 10% KR ✓ 10% South Korea: Approved · max 10% EU ✓ 10% Europe: Approved · max 10% US · — United States: Pending
03 Safety profile
EWG score
1
Reef-toxic
No
Endocrine disruptor
No
Comedogenicity
0
Reference

Frequently asked questions

What kind of UV does Iscotrizinol absorb?

It is a UVB filter, so it is combined with UVA filters in a finished sunscreen to reach broad-spectrum coverage. On its own it is photostable, helping the overall system hold up during wear.

Can I find it in US sunscreens?

Its US status is pending in this data, so it currently appears mainly in EU, Japanese, and Korean formulas, each allowing up to 10%.

Is Iscotrizinol gentle?

Available data shows EWG 1, comedogenicity 0, and no endocrine or reef-toxicity flags, which positions it as one of the better-profile UVB filters for sensitive-skin formulas.

Why is it less common than Ethylhexyl Triazone?

It is used in fewer products overall, partly because it is newer and not yet approved in the US, and partly because formulators often default to more established UVB filters with similar profiles.

Products in catalogue

Containing Diethylhexyl Butamido Triazone