Ingredient
Trideceth-9
What is Trideceth-9?
Trideceth-9 is a polyethylene glycol ether of tridecyl alcohol, typically used in cosmetics and personal care products. It is made through the process of ethoxylation where tridecyl alcohol is reacted with ethylene oxide.
It functions primarily as an emulsifier, helping to mix water and oil components to improve product texture and consistency. Health evidence generally suggests it's safe for use in low concentrations as found in topical applications, although there can be mild irritation issues in sensitive skin.
When you see Trideceth-9 on a label, it's usually in products like moisturizers or cleansers, intended to improve application and feel. It's not intended for ingestion.
Commonly found in: moisturizers, cleansers, lotions, hair conditioners
What to watch
- May cause mild skin irritation in sensitive individuals.
The FDA permits the use of Trideceth-9 in cosmetics with no specific use restrictions.
Most studies indicate it's safe in cosmetic concentrations, but some report skin irritation in sensitive populations.
Trideceth-9 is synthetic and not derived from animals, generally considered vegan-friendly.
Sources: Final Report on the Safety Assessment of PEG-6, -8, -10, -12, -20, -32, -75, and -150 Trideceth
Scout's take
PEG-derived surfactant; possible 1,4-dioxane contamination.
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