PEG-4 Polyglyceryl-2 Stearate

What is PEG-4 Polyglyceryl-2 Stearate?

PEG-4 Polyglyceryl-2 Stearate is a synthetic, non-ionic ingredient formed by combining polyethylene glycol (PEG-4), polyglycerol-2 (derived from glycerol), and stearic acid (a fatty acid from plant sources like palm or coconut). It belongs to the class of ethoxylated polyglyceryl esters commonly used in rinse-off and leave-on skincare formulations such as moisturizers, sunscreens, and mild cleansers. In products, it functions by lowering surface tension at the oil-water interface, creating stable emulsions that prevent separation and deliver uniform texture. As a surfactant, it aids in dispersing oils and dirt for effective yet soft cleansing, while its emulsifying properties support lightweight, non-greasy consistencies ideal for daily use.

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 creation of stable lotions and creams by blending oil and water phases evenly.

Provides mild cleansing action to remove impurities without stripping moisture.

Contributes to smooth, spreadable textures in emulsions for comfortable application.

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 non-comedogenic formulas for acne-prone or oily skin.
Those sensitive to ethoxylated or PEG-containing ingredients.
Users of emulsified products like daily moisturizers and body lotions.
Individuals avoiding synthetic surfactants in favor of fully natural options.
People preferring lightweight, stable skincare textures.
People with known allergies to fatty acid esters.

Safety Notes

  • Considered safe for cosmetic use by regulatory reviews with low overall hazard ratings.
  • Non-comedogenic, unlikely to clog pores based on standard assessments.

Frequently Asked Questions about PEG-4 Polyglyceryl-2 Stearate

What does PEG-4 Polyglyceryl-2 Stearate do in skincare?

It acts as an emulsifier to mix oil and water stably and as a surfactant for gentle cleansing in lotions and washes.

Is it safe for daily use?

Yes, it holds low hazard ratings and is widely used in cosmetics without notable concerns when properly formulated.

Does it clog pores?

No, it has a comedogenic rating of 0, making it suitable for blemish-prone skin.