C12-15 Pareth-3

What is C12-15 Pareth-3?

C12-15 Pareth-3 is a synthetic non-ionic surfactant from the pareth series, created by reacting a blend of C12-15 fatty alcohols with three units of ethylene oxide. This process yields an amphiphilic molecule with a hydrophobic alkyl chain and hydrophilic polyoxyethylene head, balancing affinity for both water and oils. Primarily used in rinse-off cleansers like shampoos, shower gels, and facial washes, as well as leave-on emulsions such as moisturizers and sunscreens. In formulations, it functions by disrupting interfacial tension, allowing water to mix with sebum and impurities for effective removal during cleansing. As an emulsifier, it forms micellar structures that encapsulate oil droplets in water-based systems, promoting phase stability and preventing separation for a creamy, even consistency. Its short ethoxylation chain contributes to milder performance versus longer-chain alternatives.

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:

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

Facilitates gentle dirt and oil removal by reducing surface tension in cleansing products.

Supports stable blending of oil and water for smooth lotion and cream textures.

Aids in creating light foam in washes without excessive drying.

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 cleansers needing mild surfactant action.
Those with rare sensitivity to ethoxylated alcohols.
Individuals with lotions or creams benefiting from emulsion stability.
People experiencing irritation from similar non-ionic surfactants.
People preferring non-comedogenic ingredients in rinse-off items.
Individuals skipping untested new formulas on reactive skin.

Safety Notes

  • Assessed as low hazard in cosmetic concentrations by safety reviews.
  • Minimal skin and eye irritation in standard use levels.

Frequently Asked Questions about C12-15 Pareth-3

What does C12-15 Pareth-3 do in products?

It acts as a surfactant to cleanse by mixing water and oils, and emulsifies for stable lotions.

Is it safe for everyday use?

Safety panels deem it suitable at typical cosmetic levels with low concern.

Does it cause breakouts?

Rated non-comedogenic, unlikely to clog pores.