Perfluorononylethyl Carboxydecyl PEG-10 Dimethicone

What is Perfluorononylethyl Carboxydecyl PEG-10 Dimethicone?

Perfluorononylethyl carboxydecyl PEG-10 dimethicone is a synthetic hybrid polymer combining dimethicone—a silicone backbone—with a hydrophilic polyethylene glycol (PEG-10) chain and a hydrophobic perfluorinated alkyl group from perfluorononylethyl carboxydecyl. This structure creates an amphiphilic molecule suited for cosmetic formulations, particularly in color cosmetics, primers, and water-resistant products. It works by reducing surface tension at interfaces, stabilizing water-in-silicone emulsions, and modifying surface properties to enhance product spread, adhesion, and slip on skin. The fluorinated chain contributes oil- and water-repellency, aiding long-wear performance, while the PEG and silicone provide conditioning and a lightweight feel without greasiness.

Comedogenic Rating 0/5 Low risk of clogging pores
EWG Safety Rating 6 View on EWG →

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

Emollient
Softens and smooths skin by filling in surface roughness and improving slip; can also help reduce moisture loss when paired with occlusives and film formers.
Surface modifier
Alters surface properties such as wetting, spread, and feel, helping improve application, coverage, and sensory profile on skin, hair, or pigments.
Surfactant
Lowers surface tension to enable cleansing, emulsifying, and foaming; central to shampoos, body washes, and many emulsions and micellar systems.
Emulsifying agent
Enables stable mixing of oil and water phases by forming an interfacial film, helping create lotions, creams, and cleansers with consistent texture.
Skin conditioning agent
Maintains skin softness, smoothness, and flexibility.

Benefits

Provides a silky, smooth application that improves product glide and even coverage on skin.

Helps form stable emulsions in silicone-based formulas for consistent texture.

Supports skin softening and moisture retention through emollient action.

Who It's For

A quick guide for who this ingredient may suit (and who should be cautious).

Who May Benefit Who Should Avoid
Individuals seeking long-lasting, water-resistant makeup finishes.
Those concerned about fluorinated compounds due to persistence in environment.
People with normal to oily skin preferring non-comedogenic slip agents.
People preferring silicone-free or minimal-ingredient formulations.
Users of silicone-heavy products wanting enhanced spreadability.
Individuals with known sensitivity to PEG-modified ingredients.

Safety Notes

  • Rated high concern by some databases due to limited toxicity data and fluorochemical properties.
  • Functions in rinse-off and leave-on products within typical cosmetic use levels.

Frequently Asked Questions about Perfluorononylethyl Carboxydecyl PEG-10 Dimethicone

What makes this ingredient unique in cosmetics?

Its fluorinated chain paired with PEG-silicone enables water-repellent, smooth-spreading emulsions.

Is it suitable for acne-prone skin?

It has a non-comedogenic rating, helping avoid pore clogging while providing slip.

Why the high safety concern rating?

Primarily from data limitations on fluorochemicals, not proven acute skin effects.