Steareth-10

What is Steareth-10?

Steareth-10, also known as PEG-10 stearyl ether, is a non-ionic surfactant produced by reacting stearyl alcohol—a fatty alcohol derived from stearic acid found in animal or vegetable fats—with ethylene oxide to add a chain of 10 ethylene glycol units. This ethoxylation process creates a molecule with both hydrophilic (water-loving) and lipophilic (oil-loving) properties, making it ideal for cosmetic formulations. Commonly used in rinse-off cleansers, shampoos, lotions, and creams, it functions primarily by lowering surface tension between oil and water phases, enabling the formation of stable emulsions with smooth textures. As a surfactant, it helps remove dirt and oils during cleansing; as an emulsifier, it prevents separation in multi-phase products; and its fatty alcohol base provides a refatting effect to soften skin post-cleansing. Its mild nature suits everyday personal care items across various product categories.

Comedogenic Rating 4/5 Higher risk of clogging pores
EWG Safety Rating 1-3 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.
Refatting
Replenishes lipids removed during cleansing to improve mildness and reduce tightness, leaving skin or hair feeling less stripped after rinse-off use.

Benefits

Helps create stable lotions and creams by blending oil and water effectively.

Supports gentle cleansing in shampoos and body washes without stripping moisture.

Adds a softening effect to skin after washing by replenishing natural lipids.

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 skin seeking milder cleansers that leave a soft feel.
Users with oily skin due to potential pore-clogging tendencies.
Individuals using emulsion-based moisturizers for even texture.
Acne-prone individuals, as it may contribute to comedone formation.
Those preferring products with balanced cleansing and conditioning.
People sensitive to ethoxylated ingredients in high concentrations.

Safety Notes

  • Rated low hazard by EWG, indicating general safety in typical use levels.
  • Deemed safe for cosmetic use by expert reviews with no significant concerns.

Frequently Asked Questions about Steareth-10

What does Steareth-10 do in skincare?

It acts as a surfactant for cleansing, emulsifier for stable textures, and refatting agent to soften skin.

Is Steareth-10 safe for daily use?

Yes, it's generally safe in cosmetics at common levels per safety assessments.

Does it clog pores?

It has a higher comedogenic potential, so caution advised for oily or acne-prone skin.