Ingredient review

Laureth-14 Carboxylic Acid

INCI: LAURETH-14 CARBOXYLIC ACID

A gentle, effective surfactant that helps cleanse without stripping the skin's natural moisture barrier.

beautyskincaresurfactant

In plain English

Laureth-14 carboxylic acid is a mild cleansing ingredient often used in soaps and shampoos. It helps remove dirt and oil while being less harsh than traditional sulfates, making it a good choice for sensitive skin. It also helps other ingredients mix well in a formula.

Review score

Safety, usefulness, and evidence

3.8Good
3.8/ 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

Laureth-14 Carboxylic Acid 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 Laureth-14 Carboxylic Acid.
  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 and then adding a carboxylic acid group. It belongs to the ether carboxylic acid family, known for mild cleansing.

How it works

It reduces the surface tension between water and oil, allowing dirt and excess sebum to be rinsed away. Its mildness comes from its large, gentle molecular structure that doesn't disrupt the skin's lipid barrier as aggressively as harsher surfactants.

Pros

Mild on skin

Less stripping than sodium lauryl sulfate, making it suitable for daily use on sensitive or dry skin.

Good foam quality

Produces a rich, creamy lather that feels pleasant without excessive drying.

Cons and cautions

Ethoxylation concerns

The manufacturing process can create trace amounts of 1,4-dioxane, a potential contaminant, though reputable brands purify it out.

Not fully natural

Despite being derived from natural fats, the ethoxylation step makes it semi-synthetic, which may not appeal to all consumers.

Best for

  • People with dry or sensitive skin seeking a mild cleanser
  • Anyone looking for a sulfate-free alternative

Use caution if

  • Those with known allergies to ethoxylated ingredients (rare)
  • Individuals preferring fully natural or plant-derived surfactants

Usage tips

Use in rinse-off products for best mildness
Combine with other gentle surfactants for a balanced cleansing system
Avoid leave-on products if you have very reactive skin

Safety summary

Generally recognized as safe for cosmetic use at typical concentrations. The main concern is potential 1,4-dioxane contamination, which is regulated and minimized by quality manufacturers.

Research notes

Studies indicate low skin irritation and sensitization potential compared to traditional anionic surfactants. Long-term safety data is limited but consistent with its mild profile.

Common label clues

Typical concentration
0.5% to 5% in rinse-off products; lower in leave-on formulations
Regulatory status
Approved for use in cosmetics in the US (FDA), EU (CosIng), and many other regions. Manufacturers must ensure low 1,4-dioxane levels.
Common uses
Facial cleansers, Body washes, Shampoos, Conditioners, Emulsions
Environmental note
Derived from renewable plant oils, but the ethoxylation process has some environmental footprint. Biodegradability is moderate.

Good to know

  • Often listed as 'Laureth-14' on labels
  • Can be found in sulfate-free shampoos and sensitive-skin cleansers

Common questions

What is Laureth-14 Carboxylic Acid in beauty products?

Laureth-14 carboxylic acid is a mild cleansing ingredient often used in soaps and shampoos. It helps remove dirt and oil while being less harsh than traditional sulfates, making it a good choice for sensitive skin. It also helps other ingredients mix well in a formula.

What does Laureth-14 Carboxylic Acid do in a beauty product?

It reduces the surface tension between water and oil, allowing dirt and excess sebum to be rinsed away. Its mildness comes from its large, gentle molecular structure that doesn't disrupt the skin's lipid barrier as aggressively as harsher surfactants.

Is Laureth-14 Carboxylic Acid safe for most people?

Generally recognized as safe for cosmetic use at typical concentrations. The main concern is potential 1,4-dioxane contamination, which is regulated and minimized by quality manufacturers.

Who should be careful with Laureth-14 Carboxylic Acid?

Those with known allergies to ethoxylated ingredients (rare) Individuals preferring fully natural or plant-derived surfactants

Research sources

CosIng - European Commission databaseOpenPubMed - Surfactant mildness comparisonOpenEnvironmental Working Group (EWG) - Ingredient safetyOpen

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.