Ingredient review
Trideceth-6
INCI: TRIDECETH-6
A gentle synthetic emulsifier that helps cleansers and lotions mix oil and water without stripping the skin.
In plain English
Trideceth-6 is a man-made ingredient that helps oil and water blend together in products like cleansers and makeup removers. It is a type of surfactant, which means it can help lift dirt and oil from your skin so they rinse away easily. Because it is mild, it is often used in gentle cleansing formulas that don't leave your skin feeling tight or dry.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is useful, but some claims depend heavily on the formula.
Risk flags are low for most users, though the finished product can still irritate.
- Source
- synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Trideceth-6 is generally a lower-concern ingredient when the full formula suits your skin.
Plain-English read
Treat this as a practical screening step before you compare products that contain this ingredient.
- Step 1Start with the score, then check the irritation and clogging risk before judging Trideceth-6.
- Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
- Step 3If a product stings, breaks you out, or worsens irritation, judge the finished formula and stop using it even if the ingredient scores well.
Score terms in plain English
Irritation risk
lowLess likely to sting, burn, or bother most users, though sensitive skin can still react.
Clogging risk
lowLess likely to feel heavy or contribute to clogged pores for most skin types.
Evidence level
moderateThere is useful support, but formula details and claim strength still matter.
What it is
Trideceth-6 is a synthetic ethoxylated alcohol, specifically a polyethylene glycol ether of tridecyl alcohol. It belongs to the alkyl ethoxylate family and functions primarily as a non-ionic surfactant and emulsifier in cosmetic formulations.
How it works
Trideceth-6 reduces the surface tension between oil and water, allowing them to mix into a stable emulsion. In cleansers, it helps surround and lift oil-based impurities and makeup from the skin, making them easy to rinse off with water. Its non-ionic nature means it is less likely to irritate compared to some other surfactants.
Pros
Gentle cleansing
Trideceth-6 effectively removes oil and makeup without the harsh stripping associated with stronger surfactants like sodium lauryl sulfate.
Stable emulsions
It helps keep oil and water blended in lotions and creams, preventing separation and ensuring a consistent texture every time you use the product.
Cons and cautions
Ethoxylation concerns
As an ethoxylated ingredient, trace amounts of 1,4-dioxane (a potential contaminant) can form during manufacturing, though reputable brands purify to remove it.
Potential dryness
In high concentrations or for very sensitive skin, it may still cause some dryness or tightness, especially if used in a rinse-off product without added moisturizers.
Best for
- People with normal to combination skin looking for a gentle cleanser
- Anyone using makeup removers or micellar waters
Use caution if
- Those with known sensitivity to ethoxylated ingredients or very dry, compromised skin barriers
Usage tips
Safety summary
Trideceth-6 is considered safe for use in cosmetics at typical concentrations. The main concern is potential contamination with 1,4-dioxane during manufacturing, but reputable suppliers and brands use purification steps to keep levels well below safety limits. It is generally non-irritating and non-comedogenic.
Research notes
Studies on ethoxylated alcohols like Trideceth-6 indicate low acute toxicity and low skin irritation potential. The Cosmetic Ingredient Review (CIR) has evaluated similar ingredients and concluded they are safe for cosmetic use when formulated properly. No significant human or animal studies specifically on Trideceth-6 are widely cited, but the class is well-understood.
Common label clues
- Typical concentration
- Typically 0.5% to 5% of the formula
- Regulatory status
- Approved for use in cosmetics in the US (FDA), EU (CosIng), and many other regions. The Cosmetic Ingredient Review (CIR) panel has reviewed ethoxylated alcohols and found them safe as used.
- Common uses
- Cleansers, Shampoos, Body washes, Makeup removers
- Environmental note
- Trideceth-6 is biodegradable, but the ethoxylation process involves ethylene oxide, which is produced from fossil fuels. Some consumers prefer plant-based alternatives.
Good to know
- Trideceth-6 is considered safe by major regulatory bodies when used in cosmetics at typical concentrations.
- It is often used in combination with other surfactants to create a balanced cleansing experience.
Common questions
What is Trideceth-6 in beauty products?
Trideceth-6 is a man-made ingredient that helps oil and water blend together in products like cleansers and makeup removers. It is a type of surfactant, which means it can help lift dirt and oil from your skin so they rinse away easily. Because it is mild, it is often used in gentle cleansing formulas that don't leave your skin feeling tight or dry.
What does Trideceth-6 do in a beauty product?
Trideceth-6 reduces the surface tension between oil and water, allowing them to mix into a stable emulsion. In cleansers, it helps surround and lift oil-based impurities and makeup from the skin, making them easy to rinse off with water. Its non-ionic nature means it is less likely to irritate compared to some other surfactants.
Is Trideceth-6 safe for most people?
Trideceth-6 is considered safe for use in cosmetics at typical concentrations. The main concern is potential contamination with 1,4-dioxane during manufacturing, but reputable suppliers and brands use purification steps to keep levels well below safety limits. It is generally non-irritating and non-comedogenic.
Who should be careful with Trideceth-6?
Those with known sensitivity to ethoxylated ingredients or very dry, compromised skin barriers
Research sources
Ingredient reviews are educational and are not medical advice. Patch test new products and ask a licensed clinician about persistent irritation, allergies, pregnancy-specific questions, or diagnosed skin conditions.