C12-20 Acid PEG-8 Ester

PEG / Ethoxylated

What is C12-20 Acid PEG-8 Ester?

C12-20 Acid PEG-8 Ester is a synthetic ingredient created by esterifying a blend of straight-chain fatty acids ranging from 12 to 20 carbon atoms—such as lauric, myristic, palmitic, stearic, and others—with polyethylene glycol containing eight ethylene oxide units (PEG-8). This results in an amphiphilic molecule with both hydrophilic and lipophilic properties. Primarily found in rinse-off cleansing products like shampoos, body washes, and facial cleansers, as well as leave-on emulsions such as lotions and creams, it operates by reducing surface tension at interfaces. This action disperses oils and dirt during washing and stabilizes oil-in-water mixtures by forming protective films around droplets, preventing separation and ensuring smooth textures. Its mild nature suits everyday personal care formulations requiring effective yet gentle performance.

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 thorough cleansing by breaking down oils and impurities on skin and hair.

Helps create stable emulsions in lotions and creams for even application.

Contributes to light foaming in washes without harsh stripping.

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 gentle daily cleansers for normal skin types.
Those with known sensitivity to PEG compounds or ethoxylated ingredients.
People using emulsified moisturizers needing consistent textures.
People preferring silicone- and PEG-free formulations.
Users of shampoos and body washes preferring mild surfactants.
Individuals concerned about potential impurities in ethoxylated products.

Safety Notes

  • Rated moderate concern by EWG due to possible contamination risks in ethoxylation process, though purified forms are common in cosmetics.
  • Non-comedogenic with a rating of 0, unlikely to clog pores.

Frequently Asked Questions about C12-20 Acid PEG-8 Ester

What does C12-20 Acid PEG-8 Ester do in products?

It acts as a surfactant to cleanse and foam, and as an emulsifier to blend oils and water for stable formulas.

Is it safe for sensitive skin?

It has low irritation potential per safety assessments, but those sensitive to PEGs may patch test.

Does it clog pores?

No, it carries a comedogenic rating of 0, suitable for acne-prone skin.