C12-13 Pareth-9

What is C12-13 Pareth-9?

C12-13 Pareth-9 is a synthetic nonionic surfactant produced by reacting a blend of C12 and C13 fatty alcohols—derived from natural fats or petroleum—with nine units of ethylene oxide. This process creates a hydrophilic (water-loving) head and hydrophobic (oil-loving) tail, enabling it to bridge oil and water. Primarily used in rinse-off products like shampoos, body washes, facial cleansers, and makeup removers, it also appears in leave-on items such as lotions and creams. By lowering surface tension, it lifts dirt, oil, and impurities from skin and hair, allowing them to rinse away easily. As an emulsifier, it forms a protective film around oil droplets in water-based formulas, preventing separation and ensuring smooth, consistent textures. Its mild nature suits daily cleansing routines across various formulations.

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

Delivers thorough cleansing by removing oils and residues without harshness.

Supports stable product textures in creams and lotions through emulsification.

Enhances foaming action for satisfying lather in washes and shampoos.

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 mild, effective cleansers for daily use.
Those with allergies to polyethylene glycol ethers.
People with normal to oily skin preferring non-comedogenic options.
People preferring sulfate-free or fully natural ingredient lists.
Users of foaming or emulsified products like shampoos and moisturizers.
Individuals sensitive to ethoxylated compounds in high concentrations.

Safety Notes

  • Considered low hazard with minimal irritation potential in typical cosmetic use.
  • Non-comedogenic, unlikely to clog pores based on available assessments.

Frequently Asked Questions about C12-13 Pareth-9

What does C12-13 Pareth-9 do in skincare?

It acts as a surfactant to cleanse by reducing surface tension and an emulsifier to blend oils and water stably.

Is C12-13 Pareth-9 safe for sensitive skin?

It has low irritation potential and is suitable for many, though patch testing is advised for sensitivities.

Does it clog pores?

Rated non-comedogenic, making it appropriate for acne-prone skin.