What it is
This is a silicone fluid carrying phenyl and propyl groups, which give it a higher refractive index and a smooth, non-greasy glide. It spreads easily, leaves a soft silky finish, and can add subtle shine and improve the spreadability of pigments and filters. In sunscreens and tinted products it helps the formula apply evenly and feel light on the skin.
Safety & warnings
Silicone fluids of this kind are generally well tolerated, non-sensitizing for most users, and not classed as fragrance allergens.
Origin & sourcing
Synthetic; a chemically modified polysiloxane (silicone) derived from silicon and organic substituents.
Questions everyone asks
Why is Phenyl Propyl Trimethicone added to sunscreen?
It provides a smooth, silky glide, adds subtle gloss, and helps the product and its pigments spread evenly.
Is it the same as regular dimethicone?
It is a related silicone, but the added phenyl group gives it more shine and a higher refractive index than standard dimethicone.