PEG-90m

PEG / Ethoxylated

What is PEG-90m?

PEG-90M is a synthetic, water-soluble polymer derived from the polymerization of ethylene oxide, with an average molecular weight around 90,000 daltons. This high-molecular-weight polyethylene glycol appears as a white, waxy solid that dissolves readily in water. In cosmetics, it serves primarily in makeup formulations like pressed powders and eyeshadows, as well as creams and lotions. It functions by forming a flexible, cohesive matrix that binds powdered particles together, enhancing product durability and preventing crumbling. As an emulsion stabilizer, it strengthens the interface between oil and water phases to maintain uniformity. Its viscosity-controlling properties adjust flow and thickness, ensuring smooth spreadability and suspension of other components without altering sensory feel.

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

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.
Emulsion stabilizer
Improves emulsion robustness by preventing droplet coalescence and phase separation, often by thickening, structuring, or strengthening the interfacial layer.
Viscosity controlling agent
Adjusts thickness to the desired level for stability and usability, improving dispensing, suspension, and texture across many formulation types.

Benefits

Provides strong binding for solid cosmetics, improving durability and ease of application.

Stabilizes emulsions to prevent separation, extending shelf life and consistency.

Controls thickness for optimal texture, enhancing user experience across product types.

Who It's For

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

Who May Benefit Who Should Avoid
Users of pressed powders and makeup sticks seeking long-lasting wear.
Those with rare sensitivity to polyethylene glycols.
Individuals with oily or acne-prone skin, as it shows no comedogenic potential.
Individuals concerned about ethoxylated ingredients from impurities.
People preferring stable lotions and creams that maintain uniformity over time.
People with very dry skin preferring non-polymer textures.

Safety Notes

  • High molecular weight limits skin penetration, supporting safety in rinse-off and leave-on products.
  • Regulatory reviews affirm use in cosmetics at typical concentrations with low concern for irritation.

Frequently Asked Questions about PEG-90m

What is PEG-90M used for in skincare?

It binds solids, stabilizes emulsions, and controls viscosity for better product performance.

Is PEG-90M safe for sensitive skin?

It has low irritation potential, especially due to high molecular weight limiting absorption.

Does PEG-90M clog pores?

It carries a comedogenic rating of zero, suitable for acne-prone skin.