PEG/PPG-8/3 Diisostearate

What is PEG/PPG-8/3 Diisostearate?

PEG/PPG-8/3 Diisostearate is a synthetic copolymer derived from polyethylene glycol with eight ethylene oxide units, polypropylene glycol with three propylene oxide units, and esterified with two molecules of isostearic acid, a branched-chain fatty acid produced from oleic or stearic acids. This ingredient belongs to the class of PEG/PPG esters commonly used in rinse-off and leave-on cosmetic products such as makeup removers, oil cleansers, shampoos, and emulsion-based lotions. It functions by reducing surface tension between oil and water phases, enabling the formation of stable micelles or emulsions. In oil-based removers, it solubilizes pigments and oils into water rinses; in emulsions, it creates a protective film at the interface for uniform blending and consistent product spreadability 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.

Benefits

Supports stable oil-water mixtures for even lotion and cream textures.

Facilitates thorough cleansing in shampoos and body washes by lowering surface tension.

Helps makeup removers effectively lift oils and residues with rinse-off ease.

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 emulsion skincare like lotions needing consistent blend.
Those sensitive to PEG compounds due to potential irritation.
Individuals with oily skin preferring non-comedogenic cleansers.
Users concerned about ethoxylation impurities in cosmetics.
People seeking mild surfactants in daily shampoos or washes.
Individuals preferring fully natural or PEG-free formulations.

Safety Notes

  • Rated moderate concern by EWG for potential contamination risks.
  • Assessed safe for cosmetic use by CIR with purity standards.

Frequently Asked Questions about PEG/PPG-8/3 Diisostearate

What products contain PEG/PPG-8/3 Diisostearate?

Common in makeup removers, oil cleansers, shampoos, and emulsion lotions.

Is it suitable for acne-prone skin?

Yes, with a comedogenic rating of 0, it avoids pore clogging.

Does it pose safety concerns?

EWG rates it 3; CIR deems it safe when meeting purity guidelines.