C12-15 Pareth-9

What is C12-15 Pareth-9?

C12-15 Pareth-9 belongs to the pareth family of nonionic surfactants, created by ethoxylating a blend of branched and linear C12-15 alcohols with nine ethylene oxide units. This synthetic ingredient appears in rinse-off products like shampoos, body washes, facial cleansers, and micellar waters, as well as some leave-on emulsions such as lotions. It works by lowering surface tension between oil and water, enabling dirt and oils to be lifted away during cleansing. In formulations, it stabilizes mixtures by forming a protective film at the interface of immiscible phases, promoting even distribution and preventing separation. Its mild nature suits everyday personal care routines, contributing to effective yet gentle product performance across various skin types.

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

Helps create rich lather in shampoos and body washes for thorough cleansing.

Stabilizes lotions and creams, ensuring smooth, consistent application.

Supports micellar waters in gently removing makeup without harsh rubbing.

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 seeking effective yet mild cleansers for daily routines.
Those with extremely sensitive skin prone to surfactant reactions.
Individuals with normal to combination skin needing stable emulsions.
Individuals experiencing dryness from frequent cleansing.
People preferring foam-rich shampoos and body washes.
People preferring fully natural or preservative-free formulations.

Safety Notes

  • Rated low hazard by independent safety assessments.
  • Generally well-tolerated in rinse-off products at typical use levels.

Frequently Asked Questions about C12-15 Pareth-9

What is C12-15 Pareth-9 used for?

It serves as a surfactant and emulsifier in shampoos, cleansers, and lotions to aid cleansing and stabilize textures.

Is C12-15 Pareth-9 safe for skin?

Safety reviews indicate low concern when used as directed in cosmetics.

Does it cause irritation?

It typically shows low irritation in formulated products.