Methylene Bis-Benzotriazolyl Tetramethylbutylphenol
Filters UV light.
In the Chemical UV filters group
What it is
A lab-made compound that filters ultraviolet (UV) light. One of the chemical UV filters.
Filters UV rays to help protect the skin and hair, and keeps the product stable in light.
What it does in a formula
Filters UV lightOfficial EU function: UV filter
Shields the formula from lightOfficial EU function: Light stabilizer
Why some people watch for it
Chemical UV filters
Some people prefer mineral sunscreens and avoid organic filters, for example because of sensitive skin or eyes or a preference for mineral-only formulas.
What official sources say
Worth knowing · The pure substance, EU
As a pure substance it is hazardous to the environment (EU harmonised classification). How much a product contains matters.
Regulation (EC) No 1272/2008 (CLP), consolidated text, Annex VI Part 3 Table 3 (harmonised classifications), retrieved 2026-10-09Restricted in certain uses · Cosmetics, EU
Its nano form is allowed as a UV filter in EU cosmetics up to 10% (Annex VI).
Regulation (EC) No 1223/2009, Annex VI: list of UV filters allowed in cosmetic products, retrieved 2026-10-09Restricted in certain uses · Cosmetics, EU
Allowed as a UV filter in EU cosmetics up to 10% (Annex VI).
Regulation (EC) No 1223/2009, Annex VI: list of UV filters allowed in cosmetic products, retrieved 2026-10-09