Surfactant ingredient

Trideceth-9

An ethoxylated C13 fatty alcohol with 9 ethylene oxide units, used as a mild nonionic emulsifier and solubilizer in toners and light formulations; differs from Trideceth-6 and Trideceth-10 already in the KB by degree of ethoxylation.

emulsifiersolubilizer

Benefits

  • Solubilizes oils and fragrance in water-based formulas
  • Mild nonionic emulsification

Watch for

  • Ethoxylated ingredient — trace 1,4-dioxane contamination possible unless properly vacuum-stripped during manufacture

In depth

What it does

An ethoxylated C13 fatty alcohol with 9 ethylene oxide units, used as a mild nonionic emulsifier and solubilizer in toners and light formulations; differs from Trideceth-6 and Trideceth-10 already in the KB by degree of ethoxylation. As an surfactant ingredient, it is particularly valued for solubilizes oils and fragrance in water-based formulas and mild nonionic emulsification.

How to use it

Used as part of a cleanser, so placement is straightforward — it's your first step, applied to damp skin and rinsed off thoroughly. Avoid overwashing, which can disrupt the skin barrier.

At a glance
CategorySurfactant
IrritancyLow–moderate
Beginner-friendlyYes
In your routine

Generally well-tolerated and easy to layer.

Found in 2 products
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Products with Trideceth-9

Azulene TonerToner
Doctor Eckstein
Azulene Toner
TonerToner
Doctor Eckstein
Toner