PEG-9 Polydimethylsiloxyethyl Dimethicone

PEG / Ethoxylated

What is PEG-9 Polydimethylsiloxyethyl Dimethicone?

PEG-9 Polydimethylsiloxyethyl Dimethicone is a hybrid synthetic ingredient blending a silicone backbone—polydimethylsiloxane—with polyethylene glycol (PEG-9) chains and polydimethylsiloxyethyl groups. This modification enhances its water solubility compared to traditional silicones, making it versatile for rinse-off and leave-on cosmetics like shampoos, conditioners, lotions, serums, and foundations. In formulations, it acts by depositing a lightweight, non-greasy film that improves spreadability and texture. As a conditioning agent, it enhances softness and manageability on skin and hair. Its surfactant properties reduce surface tension, supporting foam formation and cleansing efficiency. Emulsifying capabilities stabilize oil-in-water systems, preventing separation for consistent product performance across various personal care categories.

Comedogenic Rating 0/5 Low risk of clogging pores
EWG Safety Rating 3 View on EWG →

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

Skin conditioning agent
Maintains skin softness, smoothness, and flexibility.
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.

Benefits

Imparts a silky, non-oily texture to skin and hair surfaces.

Facilitates stable blending of water and oil phases in creams and cleansers.

Enables effective yet mild cleansing through surface tension reduction.

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 desiring smooth, lightweight product textures.
Those with known sensitivity to PEG compounds.
Users of shampoos and conditioners for better manageability.
Individuals preferring silicone-free or PEG-free formulations.
People incorporating emulsified lotions or serums into routines.
Users concerned about potential trace impurities in cosmetics.

Safety Notes

  • Assessed as safe for cosmetic use by regulatory reviews when properly manufactured.
  • Low comedogenic potential, unlikely to clog pores.

Frequently Asked Questions about PEG-9 Polydimethylsiloxyethyl Dimethicone

Is PEG-9 Polydimethylsiloxyethyl Dimethicone comedogenic?

Rated non-comedogenic with a score of 0, suitable for acne-prone skin.

What products commonly contain it?

Found in shampoos, conditioners, lotions, and makeup for texture and stability.

Does it suit sensitive skin?

Generally low irritation potential, but patch test if PEG-sensitive.