Ingredient review

Sodium Laureth-11 Carboxylate

INCI: SODIUM LAURETH-11 CARBOXYLATE

A gentle, non-stripping surfactant that cleanses without disrupting the skin barrier, ideal for sensitive or dry skin.

beautyskincarecleanser

In plain English

Sodium Laureth-11 Carboxylate is a mild cleansing agent used in soaps and shampoos. It helps remove dirt and oil without making your skin feel tight or dry. Think of it as a gentle cleaner that respects your skin's natural moisture barrier.

Review score

Safety, usefulness, and evidence

4.0Good
4.0/ 5

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
How reviews are scored

Quick decision guide

Useful, but context matters

Sodium Laureth-11 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.

  1. Step 1Start with the score, then check the irritation and clogging risk before judging Sodium Laureth-11 Carboxylate.
  2. Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
  3. 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

low

Less likely to sting, burn, or bother most users, though sensitive skin can still react.

Clogging risk

low

Less likely to feel heavy or contribute to clogged pores for most skin types.

Evidence level

moderate

There is useful support, but formula details and claim strength still matter.

What it is

A semi-synthetic surfactant made by reacting lauryl alcohol (from coconut or palm oil) with ethylene oxide, then adding a carboxylate group. It belongs to the ether carboxylate family, known for mildness.

How it works

It lowers the surface tension of water, allowing oil and dirt to be rinsed away. Its large, gentle molecular structure makes it less likely to penetrate the skin and cause irritation compared to harsher sulfates.

Pros

Very gentle on skin

Unlike sodium lauryl sulfate, this surfactant is large and mild, so it cleans without stripping natural oils or causing tightness.

Supports barrier health

Its low irritation profile helps maintain the skin's protective barrier, reducing the risk of dryness or irritation over time.

Cons and cautions

Potential trace impurity

As an ethoxylated ingredient, it may contain trace amounts of 1,4-dioxane, though reputable manufacturers purify to safe levels.

Sustainability concerns

Often derived from palm oil, which can be linked to deforestation unless certified sustainable sources are used.

Best for

  • People with sensitive or dry skin
  • Those looking for a sulfate-free cleanser

Use caution if

  • Individuals with known allergies to ethoxylated ingredients (rare)

Usage tips

Use in rinse-off products like cleansers or shampoos for best results.
Pair with other mild surfactants to boost foam without increasing irritation.
Avoid leave-on products if you have very sensitive skin, as prolonged contact may still cause mild dryness.

Safety summary

Considered safe for cosmetic use at typical concentrations. The main concern is trace 1,4-dioxane, which is tightly regulated. Overall, it is one of the gentler cleansing agents available.

Research notes

Studies show ether carboxylates like this have low skin irritation and good biodegradability. Human patch tests confirm mildness compared to traditional sulfates.

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 (US) and EU CosIng database. Trace 1,4-dioxane is regulated to ≤10 ppm in the US and ≤1 ppm in the EU.
Common uses
Facial cleansers, Body washes, Shampoos, Makeup removers
Environmental note
Biodegradable under standard conditions, but sourcing from palm oil may impact rainforests unless RSPO-certified.

Good to know

  • This ingredient is often found in 'sulfate-free' formulas.
  • It can help thicken a product's texture, making it feel more luxurious.

Common questions

What is Sodium Laureth-11 Carboxylate in beauty products?

Sodium Laureth-11 Carboxylate is a mild cleansing agent used in soaps and shampoos. It helps remove dirt and oil without making your skin feel tight or dry. Think of it as a gentle cleaner that respects your skin's natural moisture barrier.

What does Sodium Laureth-11 Carboxylate do in a beauty product?

It lowers the surface tension of water, allowing oil and dirt to be rinsed away. Its large, gentle molecular structure makes it less likely to penetrate the skin and cause irritation compared to harsher sulfates.

Is Sodium Laureth-11 Carboxylate safe for most people?

Considered safe for cosmetic use at typical concentrations. The main concern is trace 1,4-dioxane, which is tightly regulated. Overall, it is one of the gentler cleansing agents available.

Who should be careful with Sodium Laureth-11 Carboxylate?

Individuals with known allergies to ethoxylated ingredients (rare)

Research sources

CosIng Database - Sodium Laureth-11 CarboxylateOpenCIR Safety Review of Ether CarboxylatesOpenPubMed - Mild Surfactants and Skin BarrierOpen

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.