PEG-8

PEG / Ethoxylated
Benefits
Soothing

What is PEG-8?

PEG-8 is a low-molecular-weight polyethylene glycol polymer, chemically synthesized by polymerizing ethylene oxide to an average of eight units, resulting in a clear, viscous liquid. Originating from petrochemical sources, it belongs to the ethoxylated alcohol family and is widely incorporated into water-based cosmetics such as lotions, gels, cleansers, toners, and serums. In formulations, it attracts atmospheric moisture into the skin's surface layers via hydrogen bonding, supporting barrier hydration without oiliness. Simultaneously, its solvent capabilities dissolve lipophilic and hydrophilic actives, optimizing blend stability, texture smoothness, and penetration for better efficacy. This dual functionality enhances product spreadability and user experience, while its mild profile suits diverse skin types in everyday care routines.

Comedogenic Rating 0/5 Low risk of clogging pores
EWG Safety Rating 1-3 View on EWG →

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

Humectant
Attracts and holds water in the stratum corneum, boosting hydration and plumpness; commonly used in moisturizers, cleansers, and hair conditioners.
Solvent
Dissolves and carries other ingredients, helping control viscosity, evaporation rate, and delivery of actives in both water- and oil-based systems.

Benefits

Enhances skin hydration by drawing in and retaining moisture.

Facilitates even distribution of active ingredients for better performance.

Offers a soothing sensation for comfortable application.

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 with dry or dehydrated skin needing moisture boost.
Those with known sensitivity or irritation to PEG compounds.
Users of lightweight moisturizers and cleansers for daily hydration.
Individuals wary of ethoxylated ingredients due to purity preferences.
People seeking non-comedogenic options in water-based products.
Users opting for completely natural or mineral-only formulations.

Safety Notes

  • EWG scores range from 1 to 3, indicating low to moderate concern.
  • Non-comedogenic with a rating of 0, unlikely to clog pores.

Frequently Asked Questions about PEG-8

What is the main function of PEG-8 in skincare?

It acts as a humectant to hydrate skin and solvent to blend ingredients smoothly.

Is PEG-8 suitable for sensitive skin?

Generally mild with low irritation potential, but patch test if sensitive to synthetics.

Does PEG-8 clog pores?

No, it carries a comedogenic rating of 0.