Ingredient review
Tridecylbenzenesulfonic Acid
INCI: Tridecylbenzenesulfonic Acid
An effective cleansing surfactant, but may be drying or irritating for sensitive skin types.
In plain English
Tridecylbenzenesulfonic acid is a synthetic ingredient that helps cleansers foam and lift away oil and dirt. It works by reducing the surface tension between water and oil, allowing them to mix so grime can be rinsed away. Because it can be strong, it's often used in small amounts or combined with milder surfactants to reduce potential irritation.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is useful, but some claims depend heavily on the formula.
Main practical flags: irritation is moderate; clogging risk is low.
- Source
- synthetic
- Evidence
- moderate
- Irritation
- moderate
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Tridecylbenzenesulfonic Acid can be useful, but watch for some irritation potential.
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 Tridecylbenzenesulfonic Acid.
- 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
moderateCan bother some users, especially with frequent use, damaged skin, or strong companion ingredients.
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
A synthetic anionic surfactant derived from petroleum, used to boost cleansing power and adjust product pH.
How it works
It lowers the surface tension of water, helping to break up oils and debris on the skin so they can be washed away. It also helps control the acidity (pH) of a formula.
Pros
Strong cleanser
Effectively removes excess oil, sebum, and non-water-soluble impurities, leaving skin feeling fresh.
pH control
Helps maintain the desired acidity in a formula, which can support skin's natural barrier function.
Cons and cautions
Potential dryness
Can strip natural oils, leading to tightness or flakiness, especially in dry or sensitive skin types.
Irritation risk
As a strong anionic surfactant, it may cause stinging or redness if used too frequently or at high levels.
Best for
- People with oily or combination skin looking for a deep cleanse
- Those who tolerate standard foaming cleansers well
Use caution if
- Individuals with dry, dehydrated, or sensitive skin
- Anyone with a compromised skin barrier or conditions like eczema
Usage tips
Safety summary
Generally considered safe for use in rinse-off cosmetics at typical concentrations. However, it can be irritating to sensitive or compromised skin. Avoid contact with eyes and prolonged skin contact.
Research notes
Limited direct studies on tridecylbenzenesulfonic acid specifically, but anionic surfactants as a class are well-studied for their cleansing efficacy and potential to disrupt the skin barrier if overused.
Common label clues
- Typical concentration
- Low to moderate (typically 1–5% in rinse-off products)
- Regulatory status
- Approved for use in cosmetics in the US, EU, and many other regions, with concentration limits typically guided by good manufacturing practices.
- Common uses
- Facial cleansers, Body washes, Shampoos
- Environmental note
- As a synthetic petroleum-derived ingredient, it may have a higher environmental footprint than plant-based alternatives. Some forms may be less biodegradable.
Good to know
- Often listed near the middle or end of an ingredient list, indicating a moderate concentration.
- Commonly combined with milder surfactants like cocamidopropyl betaine to reduce harshness.
Common questions
What is Tridecylbenzenesulfonic Acid in beauty products?
Tridecylbenzenesulfonic acid is a synthetic ingredient that helps cleansers foam and lift away oil and dirt. It works by reducing the surface tension between water and oil, allowing them to mix so grime can be rinsed away. Because it can be strong, it's often used in small amounts or combined with milder surfactants to reduce potential irritation.
What does Tridecylbenzenesulfonic Acid do in a beauty product?
It lowers the surface tension of water, helping to break up oils and debris on the skin so they can be washed away. It also helps control the acidity (pH) of a formula.
Is Tridecylbenzenesulfonic Acid safe for most people?
Generally considered safe for use in rinse-off cosmetics at typical concentrations. However, it can be irritating to sensitive or compromised skin. Avoid contact with eyes and prolonged skin contact.
Who should be careful with Tridecylbenzenesulfonic Acid?
Individuals with dry, dehydrated, or sensitive skin Anyone with a compromised skin barrier or conditions like eczema
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.