Benzophenone-3

Benzophenone-3 (also known as oxybenzone) is an organic chemical compound used in sunscreens and cosmetic products as a UV filter. It works by absorbing ultraviolet radiation and converting it into heat, thereby protecting the skin from sun exposure. It is classified as a chemical or organic UV filter, distinguishing it from mineral filters like zinc oxide or titanium dioxide.This ingredient is found in approximately 0.4% of skincare products globally and is typically used at concentrations between 1% and 6%. Beyond sun protection, it also functions as a stabiliser in some formulations, hel…

Benzophenone-3 works through absorption rather than reflection. When ultraviolet light strikes the skin, the molecule absorbs the UV energy and converts it into thermal energy (heat), which is then released harmlessly from the skin. This process happens at the molecular level within the outer layers of the skin.Because it absorbs UV radiation continuously whilst exposed to sunlight, it requires even application and regular reapplication to maintain effective protection throughout the day.

Apply benzophenone-3-containing sunscreens generously and evenly to all exposed skin at least 15 minutes before sun exposure. Reapply every two hours, or more frequently if swimming or perspiring heavily. Ensure adequate coverage by using approximately 1/4 teaspoon for the face and neck combined. Chemical filters work best when applied to dry skin, as moisture can reduce their efficacy.

Benzophenone-3 is generally well-tolerated in skincare formulations at typical concentrations. Some individuals may experience irritation or contact sensitivity; patch testing is advisable for those with sensitive skin. Environmental concerns regarding bioaccumulation and aquatic effects have led some manufacturers and consumers to explore alternative UV filters.