PEG-10 Glyceryl Triisostearate

What is PEG-10 Glyceryl Triisostearate?

PEG-10 Glyceryl Triisostearate is a synthetic polymer derived from glycerol esterified with triisostearic acid, then ethoxylated with 10 units of polyethylene glycol. Triisostearic acid features branched-chain fatty acids, often sourced from vegetable oils or petroleum. This creates a viscous, lipophilic compound commonly used in skincare formulations like moisturizers, sunscreens, and cleansers. It functions by lowering surface tension between oil and water phases, enabling stable emulsions with smooth textures. As an emollient, it mimics skin lipids to enhance spreadability and reduce dryness feel. Its surfactant properties support gentle cleansing by dispersing oils without harsh stripping. The PEG chain improves water solubility, making it ideal for oil-in-water systems where consistent blending prevents separation.

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:

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.
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

Enhances skin softness and smoothness through emollient action.

Stabilizes emulsions for even product texture in lotions and creams.

Supports mild cleansing as a surfactant in wash-off products.

Who It's For

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

Who May Benefit Who Should Avoid
People with dry skin seeking improved moisture retention and slip.
Those sensitive to ethoxylated compounds or PEG derivatives.
Individuals preferring non-comedogenic ingredients for clearer pores.
People preferring fully natural or non-synthetic skincare options.
Users of emulsified products like moisturizers for better formula stability.
Individuals concerned about potential impurities in PEG ingredients.

Safety Notes

  • Rated moderate concern by some databases due to possible low-level impurities from manufacturing.
  • Generally recognized as safe in rinse-off and leave-on cosmetics at typical use levels.

Frequently Asked Questions about PEG-10 Glyceryl Triisostearate

What does PEG-10 Glyceryl Triisostearate do in products?

It acts as an emollient to soften skin, emulsifier to blend oils and water, and surfactant for cleansing.

Is it safe for daily skincare use?

It is considered safe in cosmetics at standard concentrations, with low irritation risk.

Does it clog pores?

It has a comedogenic rating of zero, making it unlikely to contribute to breakouts.