SPF Scout · Ingredient
Methylene Bis-Benzotriazolyl Tetramethylbutylphenol
CAS 103597-45-1
What this ingredient generally does
This is an organic UV filter that absorbs ultraviolet light. It also helps stabilize the formula against light. On labels it may appear as Bisoctrizole.
Reviewed before publication. This note describes function in a formulation — nothing else.
Published formulations that list this ingredient
These are the formulations currently published in the SPF Scout catalog whose stored ingredient declaration includes this ingredient. It is not a list of every product on the market, and the order carries no meaning.
ACO Kids Active Sun Lotion SPF 50+
SPF 50+ as labeled · EU formulation
ACO Kids Active Sun Spray SPF 50+
SPF 50+ as labeled · EU formulation
Guangzhou Oupeng Cosmetics Co., Ltd. RYDEEN UV CLEAR
U.S. formulation
Checking this against your own list
You can select this ingredient in the SPF Scout app as one to flag. The app compares your selections against a product's stored declaration on your device; your list never reaches this website.
This comparison does not predict whether your skin will react.
Where this information comes from
Ingredient names, CAS numbers and recorded functions come from SPF Scout’s curated ingredient dictionary, grounded in CosIng, the European Commission’s Cosmetic Ingredient Database. Content © European Union, reused with acknowledgement.