PEG-5 Glyceryl Triisostearate

What is PEG-5 Glyceryl Triisostearate?

PEG-5 Glyceryl Triisostearate is a polyethylene glycol ether of glyceryl triisostearate, chemically formed by attaching five ethylene oxide units to a glycerol backbone esterified with branched-chain isostearic fatty acids. This synthetic compound belongs to the class of ethoxylated polyol esters commonly used in color cosmetics like lipsticks, foundations, and creams. It functions by lowering interfacial tension between oil and water phases, enabling the formation of stable emulsions with creamy consistencies. As an emollient, its branched structure mimics natural skin lipids, depositing a thin film that enhances slip and reduces tackiness during application. In surfactant roles, it aids in dispersing pigments evenly and improving product flow without greasiness. Derived from vegetable or synthetic fatty acids, it supports non-aqueous systems and anhydrous formulas where hydration balance is key.

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 feel with a silky, smooth application layer.

Stabilizes emulsions for consistent product texture over time.

Facilitates even pigment dispersion in makeup 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
Individuals seeking better makeup wear and blendability.
Those sensitive to polyethylene glycol compounds.
People with dry or rough skin wanting improved slip.
People concerned about potential impurities in ethoxylated ingredients.
Users of emulsions needing reliable phase separation prevention.
Individuals preferring fully natural or non-esterified formulations.

Safety Notes

  • Rated with moderate concern by some databases due to possible contamination risks in production.
  • Deemed safe for cosmetic use by expert reviews when properly manufactured.

Frequently Asked Questions about PEG-5 Glyceryl Triisostearate

What does PEG-5 Glyceryl Triisostearate do in products?

It softens skin surface, emulsifies oil-water mixes, and aids pigment spreading for better texture.

Is it suitable for acne-prone skin?

It carries a non-comedogenic rating, making it unlikely to clog pores.

Are there safety concerns?

Expert panels find it safe as used, with moderate database ratings noting production purity factors.