What it is
Diphenyl dimethicone is a silicone polymer carrying phenyl groups, which raise its refractive index and improve compatibility with other oils and pigments. In sunscreens and color cosmetics it acts as an emollient that spreads easily, smooths the skin surface, and helps disperse UV filters and pigments. It contributes a silky, lightweight after-feel.
Safety & warnings
Phenyl silicones such as diphenyl dimethicone are generally well tolerated, with a low likelihood of irritation or sensitization, and are typically considered low on the comedogenicity scale.
Origin & sourcing
Synthetic. It is a manufactured organosilicone polymer.
Questions everyone asks
What does diphenyl dimethicone do in sunscreen?
It acts as a smoothing emollient and helps spread and disperse UV filters and pigments for an even, silky finish.
How is it different from regular dimethicone?
The added phenyl groups give it a higher refractive index and better compatibility with oils and pigments, which suits it to sun and color products.