Ingredient review
Sodium Trideceth-3 Carboxylate
INCI: SODIUM TRIDECETH-3 CARBOXYLATE
A gentle, non-stripping surfactant that effectively cleanses while being kind to sensitive and dry skin types.
In plain English
Sodium Trideceth-3 Carboxylate is a mild cleansing ingredient often used in soaps and face washes. It helps lift dirt, oil, and makeup from your skin so they can be rinsed away with water. Unlike harsher cleansers, it is designed to clean without leaving your skin feeling tight or dry, making it a good choice for those with sensitive or easily irritated skin.
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
- semi synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Sodium Trideceth-3 Carboxylate 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 Sodium Trideceth-3 Carboxylate.
- 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
A semi-synthetic surfactant made by reacting tridecyl alcohol (a fatty alcohol from plant or petroleum sources) with ethylene oxide and then converting it to a carboxylate salt. It belongs to a class of mild, ether carboxylate surfactants known for their gentle cleansing properties.
How it works
It reduces the surface tension between water and oil, allowing water to mix with and wash away sebum, dirt, and makeup. Its large, gentle molecular structure makes it less likely to penetrate the skin barrier, which helps prevent irritation and dehydration during cleansing.
Pros
Very gentle on skin
Its mild surfactant structure cleans effectively without stripping natural oils, making it ideal for daily use on sensitive or dry skin.
Low irritation risk
Clinical and consumer reports consistently show low irritation and allergic reaction rates, even for those with reactive skin conditions like eczema.
Cons and cautions
Not fully natural
It is semi-synthetic, meaning it undergoes chemical processing. This may not align with preferences for 100% natural or organic skincare.
Potential for mild dryness at high levels
In very high concentrations (above 10%), it can still cause slight tightness or dryness, though much less than traditional sulfates.
Best for
- People with sensitive or easily irritated skin
- Those looking for a gentle, non-stripping facial cleanser
Use caution if
- Individuals seeking a completely natural or plant-only ingredient list
Usage tips
Safety summary
Sodium Trideceth-3 Carboxylate is considered safe for use in cosmetics at typical concentrations. It has a low irritation and comedogenic profile, and is well-tolerated by most skin types, including sensitive skin.
Research notes
Research on ether carboxylate surfactants, including this ingredient, supports their mildness and low skin irritation potential compared to traditional anionic surfactants like sodium lauryl sulfate. Most evidence comes from formulation studies and safety assessments rather than large-scale clinical trials.
Common label clues
- Typical concentration
- 1–10% in rinse-off products; lower in leave-on products
- Regulatory status
- Approved for use in cosmetics in the EU, US, and other major markets. Generally recognized as safe when used as directed.
- Common uses
- Facial cleansers, Body washes, Makeup removers, Shampoos
- Environmental note
- Biodegradable under standard conditions, making it a more eco-friendly choice compared to some traditional surfactants.
Good to know
- Often listed as a secondary surfactant to boost foam and mildness.
- Commonly found in sulfate-free and 'gentle' labeled cleansers.
Common questions
What is Sodium Trideceth-3 Carboxylate in beauty products?
Sodium Trideceth-3 Carboxylate is a mild cleansing ingredient often used in soaps and face washes. It helps lift dirt, oil, and makeup from your skin so they can be rinsed away with water. Unlike harsher cleansers, it is designed to clean without leaving your skin feeling tight or dry, making it a good choice for those with sensitive or easily irritated skin.
What does Sodium Trideceth-3 Carboxylate do in a beauty product?
It reduces the surface tension between water and oil, allowing water to mix with and wash away sebum, dirt, and makeup. Its large, gentle molecular structure makes it less likely to penetrate the skin barrier, which helps prevent irritation and dehydration during cleansing.
Is Sodium Trideceth-3 Carboxylate safe for most people?
Sodium Trideceth-3 Carboxylate is considered safe for use in cosmetics at typical concentrations. It has a low irritation and comedogenic profile, and is well-tolerated by most skin types, including sensitive skin.
Who should be careful with Sodium Trideceth-3 Carboxylate?
Individuals seeking a completely natural or plant-only ingredient list
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.