Trisiloxane
Trisiloxane (INCI: Octamethyltrisiloxane, CAS 107-51-7) is a clear, colorless silicone fluid with very low viscosity. It is characterized by extremely easy spreadability and high volatility, meaning it evaporates readily from the skin after application. It belongs to the silicone family and is used primarily as a skin-conditioning agent and antifoaming ingredient in cosmetic formulations.
Trisiloxane imparts a non-greasy, dry-smooth skin feel upon application. Its high volatility means it does not leave a heavy or occlusive residue on the skin. It is used across a wide range of products including primers, serums, hair treatments, and eye makeup for its lightweight, silky texture-enhancing properties.
As a volatile silicone, it evaporates quickly and is not intended to provide lasting occlusion or barrier support. No specific contraindications are noted in the source.
