Sunscreen Ranker Independent ranker
Ingredient · INCI reference

Methylene Bis-Benzotriazolyl Tetramethylbutylphenol

a.k.a. Bisoctrizole (Tinosorb M)

CAS 103597-45-1

Bisoctrizole (Tinosorb M) is a newer-generation hybrid filter that absorbs and scatters across UVA1, UVA2, and UVB and is photostable. It is approved up to 10% in the EU, Japan, and Korea, and is pending in the US. Available safety data is favorable, with an EWG score of 1 and no endocrine or reef flags.

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 ✓ 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 makes Bisoctrizole a hybrid filter?

It works through both absorption and particulate scattering, behaving partly like an organic absorber and partly like a mineral. This is why it is classified as hybrid rather than purely organic.

What UV range does it cover?

It spans UVA1, UVA2, and UVB, giving it true broad-spectrum coverage in a single ingredient. That makes it useful as a backbone filter in modern multi-filter formulas.

Is it available in US sunscreens?

Its US status is pending in this data, so it mainly shows up in sunscreens formulated for the EU, Japan, and Korea, each allowing up to 10%.

Is Bisoctrizole considered safe?

Available data shows EWG 1, comedogenicity 0, and no endocrine or reef flags, making it one of the better-profile broad-spectrum filters in current use.

Products in catalogue

Containing Methylene Bis-Benzotriazolyl Tetramethylbutylphenol