PEG-33

PEG / Ethoxylated

What is PEG-33?

PEG-33 consists of polyethylene glycol chains averaging 33 ethylene oxide units, produced synthetically through ethylene oxide polymerization with water. This clear, water-soluble liquid finds common use in moisturizers, cleansers, conditioners, and emulsions. It operates by drawing water to the skin barrier as a humectant, dissolving lipophilic and hydrophilic substances alike as a solvent to optimize formula flow and active delivery, and binding powders or solids as a binder to boost compactness and durability. Its low viscosity aids in creating lightweight textures, while compatibility with diverse ingredients enhances overall product performance across rinse-off and leave-on formats, making it a staple in modern cosmetic engineering.

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:

Binder
Helps hold solid ingredients together to form cohesive tablets, compacts, or sticks, improving pressability, integrity, and wear of the finished product.
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 attracting and retaining moisture on the surface.

Improves formula spreadability and ingredient solubility for even application.

Strengthens product structure for better integrity and user experience.

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 normal to dry skin needing moisture support in daily routines.
People with known sensitivity to ethoxylated compounds.
Users of multi-ingredient products benefiting from smooth blending.
Individuals wary of synthetic polymers in their routines.
Those preferring stable, easy-to-apply cosmetic textures.
Those prioritizing completely natural ingredient profiles.

Safety Notes

  • Considered safe for cosmetic use by expert panels when properly purified.
  • Potential for low-level impurities requires quality manufacturing standards.

Frequently Asked Questions about PEG-33

What does PEG-33 do in skincare?

It hydrates by drawing water, dissolves ingredients for better mixing, and binds components for stable formulas.

Is PEG-33 irritating to skin?

Typically low irritation potential in cosmetic concentrations per safety reviews.

Why is PEG-33 used in products?

Its multifunctional nature improves texture, solubility, and shelf life effectively.