PEG-20 Glyceryl Isostearate

PEG / Ethoxylated

What is PEG-20 Glyceryl Isostearate?

PEG-20 Glyceryl Isostearate is a non-ionic surfactant derived from glyceryl isostearate, a glycerol ester of isostearic acid—a branched, saturated fatty acid often sourced from oleic acid via clay-catalyzed isomerization. The 'PEG-20' indicates attachment of a 20-unit polyethylene glycol chain through ethoxylation, creating a hydrophilic head and lipophilic tail. This structure yields an HLB value suited for oil-in-water emulsions. Commonly found in rinse-off cleansers, shampoos, lotions, and hair conditioners, it works by lowering interfacial tension between immiscible phases, forming micelles that stabilize dispersions. Its dual surfactant-emulsifier action disperses oils effectively, while solubilizing properties dissolve lipophilic actives like fragrances into aqueous bases, ensuring uniform product texture and clarity without 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:

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.
Solubilizing agent
Helps incorporate oils and fragrance into water-based formulas by forming micro-solutions, enabling clear sprays, toners, and micellar products.

Benefits

Stabilizes emulsions in lotions and creams for even texture.

Boosts foaming and cleansing in shampoos and body washes.

Dissolves oils and scents into water-based formulas like toners.

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 daily moisturizers needing smooth application.
Individuals sensitive to ethoxylated ingredients.
People with combination skin using mild cleansers.
Those wary of potential trace impurities in PEG compounds.
Those preferring clear, non-separating sprays and micellar waters.
People seeking preservative-free or minimalistic formulations.

Safety Notes

  • Assessed as low hazard overall with limited concerns in typical use.
  • Non-comedogenic, suitable for acne-prone skin without pore-clogging risk.

Frequently Asked Questions about PEG-20 Glyceryl Isostearate

What does PEG-20 Glyceryl Isostearate do in products?

It emulsifies oils into water, stabilizes formulas, and solubilizes fragrances for consistent cleansers and lotions.

Is it safe for everyday skincare?

Safety assessments deem it suitable in cosmetics at common concentrations with low hazard ratings.

Does it clog pores?

Rated non-comedogenic, making it unlikely to contribute to breakouts.