Ingredient review

Sodium Laureth-6 Carboxylate

INCI: SODIUM LAURETH-6 CARBOXYLATE

A gentle, non-stripping surfactant that effectively cleanses while being kind to sensitive skin.

beautyskincarecleanser

In plain English

Sodium Laureth-6 Carboxylate is a mild cleansing ingredient that helps remove dirt, oil, and makeup from your skin without causing dryness or irritation. It belongs to a class of surfactants called alkyl ether carboxylates, which are known for being much gentler than traditional sulfates like SLS. Think of it as a soft, effective 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-6 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-6 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

Sodium Laureth-6 Carboxylate is a semi-synthetic surfactant made from lauryl alcohol (derived from coconut or palm oil) and ethylene oxide, then carboxylated to create a mild cleansing molecule. It is part of the alkyl ether carboxylate family, prized for its gentle cleansing and foaming properties.

How it works

In a cosmetic product, this ingredient works by reducing the surface tension between water and oil, allowing dirt and sebum to be rinsed away. Its carboxylate group gives it a mild, non-irritating profile because it is less likely to disrupt the skin's natural lipid barrier compared to harsher surfactants. It also helps create a stable, creamy foam that feels pleasant on the skin.

Pros

Extremely gentle on skin

Unlike sodium lauryl sulfate (SLS), this surfactant has a low irritation risk, making it ideal for sensitive or reactive skin types.

Supports moisture retention

Its mild cleansing action helps preserve the skin's natural lipid barrier, reducing the chance of dryness or tightness after washing.

Cons and cautions

Not for heavy-duty makeup removal

If you wear long-wear or waterproof makeup, you may need a separate oil-based cleanser first, as this ingredient alone may not fully dissolve stubborn products.

Manufacturing concerns

The production process uses ethylene oxide, which can be an environmental concern if not properly managed, though the final ingredient is considered safe for use.

Best for

  • People with dry or sensitive skin who find traditional cleansers too harsh
  • Anyone looking for a sulfate-free, gentle daily cleanser

Use caution if

  • Those who prefer completely natural or plant-derived ingredients may want to avoid semi-synthetic surfactants

Usage tips

Use in a double-cleansing routine: apply an oil cleanser first, then follow with a product containing Sodium Laureth-6 Carboxylate for a thorough but gentle second cleanse.
Look for formulations that combine it with other mild surfactants like cocamidopropyl betaine for an even more balanced cleansing experience.

Safety summary

Sodium Laureth-6 Carboxylate is considered safe for use in cosmetics. It has a low irritation and comedogenic risk, making it suitable for sensitive skin. No significant safety concerns have been raised by regulatory bodies when used as directed.

Research notes

Research on alkyl ether carboxylates indicates they are among the mildest surfactants available, with low potential for skin irritation and barrier disruption. Studies show they are less damaging to skin proteins and lipids compared to traditional sulfates.

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. The Cosmetic Ingredient Review (CIR) panel has deemed alkyl ether carboxylates safe for use in rinse-off products at typical concentrations.
Common uses
Facial cleansers, Body washes, Shampoos, Makeup removers
Environmental note
Sodium Laureth-6 Carboxylate is biodegradable, but its production involves ethylene oxide, which requires careful industrial handling to minimize environmental impact.

Good to know

  • This ingredient is often found in sulfate-free and 'gentle' labeled cleansers.
  • It is biodegradable and generally considered environmentally friendly compared to some other surfactants.

Common questions

What is Sodium Laureth-6 Carboxylate in beauty products?

Sodium Laureth-6 Carboxylate is a mild cleansing ingredient that helps remove dirt, oil, and makeup from your skin without causing dryness or irritation. It belongs to a class of surfactants called alkyl ether carboxylates, which are known for being much gentler than traditional sulfates like SLS. Think of it as a soft, effective cleaner that respects your skin's natural moisture barrier.

What does Sodium Laureth-6 Carboxylate do in a beauty product?

In a cosmetic product, this ingredient works by reducing the surface tension between water and oil, allowing dirt and sebum to be rinsed away. Its carboxylate group gives it a mild, non-irritating profile because it is less likely to disrupt the skin's natural lipid barrier compared to harsher surfactants. It also helps create a stable, creamy foam that feels pleasant on the skin.

Is Sodium Laureth-6 Carboxylate safe for most people?

Sodium Laureth-6 Carboxylate is considered safe for use in cosmetics. It has a low irritation and comedogenic risk, making it suitable for sensitive skin. No significant safety concerns have been raised by regulatory bodies when used as directed.

Who should be careful with Sodium Laureth-6 Carboxylate?

Those who prefer completely natural or plant-derived ingredients may want to avoid semi-synthetic surfactants

Research sources

Cosmetic Ingredient Review (CIR) - Safety Assessment of Alkyl Ether CarboxylatesOpenPubMed - Mild Surfactants and Skin Barrier FunctionOpenEuropean Chemicals Agency (ECHA) - Sodium Laureth-6 Carboxylate InformationOpen

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.