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PERFLUOROOCTYLETHYL TRISILOXANE.

Questionable CAS 163921-85-5 / BINDING

Perfluorooctylethyl Trisiloxane is a clear, colorless, highly volatile silicone fluid designed to enhance product spreadability. It rapidly evaporates upon skin contact, leaving behind a distinctive non-greasy, dry-smooth finish.

Binding Agent Skin Conditioning Agent

Science

This ingredient functions primarily as a binding agent and skin conditioning component. Its mechanism involves a rapid evaporation from the skin's surface, attributable to its high volatility. This characteristic contributes to the immediate perception of a dry-smooth skin feel and prevents any oily residue.


Research

Low confidence
Effective range N/A
Optimal

N/A


Transparency

Not commonly dusted

The Formula

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

Stable under recommended storage conditions, ensuring formulation integrity over time.


Safety

CIR Status
Not reviewed
Sensitization risk Unknown

Perfluorooctylethyl Trisiloxane is identified as a Per- and Polyfluoroalkyl Substance (PFAS). The FDA has reported 'significant data gaps' for many PFAS utilized in cosmetic formulations, hindering a definitive safety determination. Specifically, for 19 out of 25 frequently used PFAS, including this compound, critical toxicological data are absent. The Cosmetic Ingredient Review (CIR) Expert Panel has not conducted a direct assessment for Perfluorooctylethyl Trisiloxane.


Your Skin

No Normal
No Dry
No Oily
No Sensitive
Irritancy Unknown
Comedogenicity Unknown

Our Assessment

Questionable

Given its classification as a PFAS and the acknowledged significant data gaps regarding its safety by regulatory bodies, the inclusion of Perfluorooctylethyl Trisiloxane in precision skincare formulations is currently questionable.


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