Trideceth-3

What is Trideceth-3?

Trideceth-3 is a synthetic non-ionic surfactant produced by ethoxylating tridecyl alcohol with three units of ethylene oxide, resulting in a hydrophilic molecule suited for water-based cosmetics. It appears in shampoos, facial cleansers, body washes, and emulsion-based products like lotions. By lowering surface tension, it dislodges oils, dirt, and makeup during cleansing while enabling foam formation for a satisfying lather. As an emulsifier, it forms a protective layer at oil-water interfaces, preventing separation and ensuring even distribution of ingredients for creamy consistencies. Its short ethoxylation chain enhances mildness, allowing incorporation into both rinse-off and leave-on items without heavy residue. This versatility supports clear, lightweight formulations that spread easily on skin.

Comedogenic Rating 0/5 Low risk of clogging pores
EWG Safety Rating 1 View on EWG →
PubChem View on PubChem →

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 thorough cleansing by reducing surface tension to remove impurities.

Stabilizes oil-in-water emulsions for smooth, consistent lotion textures.

Promotes gentle foaming 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
Users of daily cleansers needing mild surfactant action.
Those sensitive to ethoxylated ingredients.
People with normal or oily skin preferring non-greasy products.
People preferring fully natural, surfactant-free formulations.
Individuals seeking stable, lightweight moisturizing lotions.
Users with highly reactive skin barriers.

Safety Notes

  • Low overall hazard rating with minimal concerns in cosmetics.
  • Non-comedogenic with a rating of 0, unlikely to clog pores.

Frequently Asked Questions about Trideceth-3

What is Trideceth-3 used for?

It serves as a surfactant and emulsifier in cleansers, shampoos, and lotions to aid cleansing, foaming, and texture stability.

Is Trideceth-3 comedogenic?

No, it has a comedogenic rating of 0, making it suitable for pore-friendly products.

How safe is Trideceth-3 in cosmetics?

It carries a low hazard rating and is generally safe at typical cosmetic concentrations.