Benzophenone-4

The details

Benzophenone-4 (aka Sulisobenzone) is a water-soluble UV filter that mainly absorbs UVB rays with some UVA coverage. It has two jobs in a formula: That's why you'll spot it in a variety of products from sunscreens to clear-packaged serums where it protects dyes, fragrances, and other actives from degrading. As a UV filter, it is fairly weak on its own. This is why it's almost always paired with stronger UV filters to build up SPF. On the regulatory side, this ingredient is well-studied and broadly considered safe as used. The EU's Scientific Committee on Consumer Safety reviewed it (and the endocrine-disruption questions that had been raised) and concluded it's safe as a UV filter up to 5%. The US and Canada allow up to 10% and the CIR Expert Panel has found benzophenones safe at cosmetic-use levels with low skin penetration. The only thing worth flagging for is contact allergy: Benzophenone-4 stands out among UV filters as a frequent trigger or allergic and photoallergic contact dermatitis. A 2007 study in Contact Dermatitis even called it an "emerging allergen" so a small subset of people may get redness or irritation from it.

Found in (1 products)

Numbuzin

9+ NAD+ Collagen Under Eye Patches

Eye Masks

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