Trideceth-9

Trideceth-9 is a nonionic surfactant formed by adding nine ethylene oxide units to tridecyl alcohol. Cleansers and toners use it as a solubilizer and wetting agent to improve clarity, spread, and rinse-off.
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Snapshot

Overview
Helps cleansers and toners mix oils into water for a clear, even wash.
Category
Cleansing, Emulsifying
Type
Surfactant

Ratings

Overall Rating

Good

Comedogenic Risk

None

Not typically evaluated for comedogenicity — no standardized rating available.

Is Trideceth-9 a Good Ingredient?

It rates Good because it provides effective solubilization and wetting for clear, even-textured formulas with generally mild nonionic surfactant action. It improves spread and wash-off without significant residue, but offers no treatment benefit of its own.

Skin Benefits

Supports a transparent look and even application, helping products glide comfortably, and assists in removing buildup during rinse, leaving skin feeling fresh.

Uses in Skincare & Cosmetics

Common in toners, micellar waters, and light gel cleansers to improve performance and aesthetics, and also used in makeup removers and hair cleansers for better distribution and wash-off.

Safety

Usually well tolerated, though it may cause mild irritation or eye sting at higher concentrations or with prolonged exposure. Best used in rinse-off formats; discontinue if persistent dryness or redness appears.