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PEG-8 TRIFLUOROPROPYL DIMETHICONE COPOLYMER.

Questionable / HAIR CONDITIONING, SKIN CONDITIONING

PEG-8 TRIFLUOROPROPYL DIMETHICONE COPOLYMER is a specialized silicone copolymer known for its exceptional conditioning properties. It forms a lightweight, breathable film on skin and hair, imparting a smooth, silky texture while providing superior resistance to water and oils.

Summary

Hair Conditioning Skin Conditioning Film Former Water/Oil Repellent Texture Enhancer Spreadability Enhancer

Science

Mechanism of Action

This ingredient functions by creating a highly durable, yet breathable, occlusive barrier on the skin and hair. The dimethicone backbone delivers characteristic slip and emollience, while the trifluoropropyl modification significantly enhances its hydrophobic and oleophobic properties. This fluorinated structure improves the longevity and waterproof performance of formulations, simultaneously boosting product spreadability and overall sensory elegance.

Research

Clinical Evidence

Insufficient-data confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

No data available regarding dusting potential for this ingredient.

The Formula

Formulation

Solubility
Water
Optimal pH 5.5 – 8.5
0 7 14

Stability

For stable formulations, an optimal pH range of 5.5 to 8.5 is recommended (based on related PEG-8 Dimethicone). It should be incorporated into the water phase of formulas and not exposed to temperatures exceeding 50°C (125°F). When formulating emulsions, addition is advised after the temperature has decreased to 50°C (125°F).

Conflicts

  • Classified as a PFAS (Per- and Polyfluoroalkyl Substance) by INCI Beauty, which may be a significant concern for formulators and consumers avoiding these compounds.

Safety

Safety Profile

CIR Status
Safe with restrictions
Sensitization risk Unknown

The Cosmetic Ingredient Review (CIR) Expert Panel has assessed related dimethicone, methicone, and substituted-methicone polymers, concluding their safety in cosmetics when appropriately formulated to be non-irritating. For PEG-8 Dimethicone, concentrations from 0.024% to 5.6% were considered safe for cosmetic use. However, INCI Beauty assigns a 'Strong penalty' to PEG-8 TRIFLUOROPROPYL DIMETHICONE COPOLYMER across all categories due to its classification as a PFAS. The Environmental Working Group (EWG) rates it 'Low' for cancer, allergies & immunotoxicity, and developmental and reproductive toxicity, but cautions that its score may increase if used in inhalable forms or if there is potential for contamination by toxic impurities.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Questionable

While offering compelling conditioning, enhanced water resistance, and superior texture benefits for various skin types, its classification as a PFAS and 'Strong penalty' from reputable sources introduce significant formulation and consumer acceptance concerns.

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