Polyglyceryl-6 Isostearate

What is Polyglyceryl-6 Isostearate?

Polyglyceryl-6 Isostearate is a synthetic ester formed by linking polyglycerol-6, a polymer of plant-sourced glycerol, with isostearic acid, a branched-chain fatty acid from vegetable oils like rapeseed or coconut. It belongs to the polyglyceryl ester family, commonly used in skincare formulations such as creams, lotions, and cleansers. In products, it works by lowering surface tension between oil and water phases, creating stable emulsions with smooth textures. As an emollient, it mimics skin lipids to smooth surface imperfections and limit water evaporation. Its surfactant properties enable micelle formation for effective yet gentle dirt removal in rinse-off items, while its emulsifying action ensures ingredient compatibility without separation.

Comedogenic Rating 0/5 Low risk of clogging pores
EWG Safety Rating 1 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

Provides a smooth, soft feel by filling skin's surface irregularities.

Stabilizes cream and lotion formulas for even application.

Supports mild cleansing by helping lift impurities without stripping moisture.

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 or rough skin seeking added softness.
Those with known allergies to glycerol derivatives.
Users of emulsion-based products like moisturizers.
People sensitive to fatty acid esters.
Individuals preferring gentle, non-drying cleansers.
Users avoiding complex emulsifiers in minimal routines.

Safety Notes

  • Considered low hazard in cosmetic concentrations by safety assessments.
  • Non-comedogenic, unlikely to clog pores.

Frequently Asked Questions about Polyglyceryl-6 Isostearate

What makes Polyglyceryl-6 Isostearate suitable for lotions?

It blends oil and water phases evenly for consistent texture.

Is it gentle on skin?

Yes, it softens without clogging pores or high irritation risk.

Where is it commonly used?

In creams, cleansers, and emulsions for stability and emolliency.