Ingredient review
Sodium Trideceth-19 Carboxylate
INCI: SODIUM TRIDECETH-19 CARBOXYLATE
A gentle, non-stripping surfactant that effectively cleanses while respecting the skin barrier.
In plain English
Sodium Trideceth-19 Carboxylate is a mild cleansing ingredient often found in gentle face washes and makeup removers. It works by helping water mix with oil and dirt so they can be rinsed away easily. Unlike harsher soaps, it is designed to clean without leaving 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
- semi synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Sodium Trideceth-19 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-19 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 a fatty alcohol (tridecyl alcohol) with ethylene oxide to create a water-soluble molecule, then converting it into a carboxylate salt. It belongs to the class of ether carboxylates, known for their mildness.
How it works
It lowers the surface tension between water and oil, allowing the product to lift sebum, makeup, and impurities from the skin. Its large molecular structure makes it less penetrating and therefore less irritating than smaller surfactants.
Pros
Very gentle on skin
Its large molecular structure means it stays on the surface and doesn't penetrate the skin, reducing the risk of irritation or barrier damage.
Effective at removing oil and makeup
It works well as an emulsifier, helping to break down and rinse away sunscreen, sebum, and light makeup without harsh scrubbing.
Cons and cautions
Low foam profile
It produces a creamy, low-foam lather rather than big bubbles, which some users may associate with less cleansing power.
Semi-synthetic origin
It is made through chemical processing of natural fatty alcohols, which may not align with a '100% natural' skincare philosophy.
Best for
- People with dry or sensitive skin
- Those looking for a non-stripping daily cleanser
Use caution if
- Individuals seeking high-foam, bubbly cleansers
- Those who prefer exclusively natural ingredients
Usage tips
Safety summary
Sodium Trideceth-19 Carboxylate is considered safe for use in cosmetics at typical concentrations. It has a low irritation and comedogenic risk, making it suitable for sensitive and acne-prone skin types.
Research notes
Ether carboxylates like this one are well-studied for their mildness compared to traditional sulfates. Human patch tests and clinical studies show very low irritation potential. Evidence is moderate but consistent.
Common label clues
- Typical concentration
- 1–10% in rinse-off products; lower in leave-on formulas
- Regulatory status
- Approved for use in cosmetics globally, including by the FDA (as part of cosmetic ingredients) and under EU CosIng regulations.
- Common uses
- Facial cleansers, Body washes, Shampoos, Makeup removers
- Environmental note
- Derived from plant-based fatty alcohols and ethylene oxide; the ethylene oxide production has environmental considerations, but the ingredient itself is biodegradable.
Good to know
- Often found in sulfate-free cleansers.
- Can be combined with other mild surfactants to adjust foam and texture.
Common questions
What is Sodium Trideceth-19 Carboxylate in beauty products?
Sodium Trideceth-19 Carboxylate is a mild cleansing ingredient often found in gentle face washes and makeup removers. It works by helping water mix with oil and dirt so they can be rinsed away easily. Unlike harsher soaps, it is designed to clean without leaving your skin feeling tight or dry.
What does Sodium Trideceth-19 Carboxylate do in a beauty product?
It lowers the surface tension between water and oil, allowing the product to lift sebum, makeup, and impurities from the skin. Its large molecular structure makes it less penetrating and therefore less irritating than smaller surfactants.
Is Sodium Trideceth-19 Carboxylate safe for most people?
Sodium Trideceth-19 Carboxylate is considered safe for use in cosmetics at typical concentrations. It has a low irritation and comedogenic risk, making it suitable for sensitive and acne-prone skin types.
Who should be careful with Sodium Trideceth-19 Carboxylate?
Individuals seeking high-foam, bubbly cleansers Those who prefer exclusively natural ingredients
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.