Ingredient review
Laureth-10 Carboxylic Acid
INCI: LAURETH-10 CARBOXYLIC ACID
A gentle, low-irritation cleansing ingredient that helps remove dirt and oil without stripping the skin.
In plain English
Laureth-10 Carboxylic Acid is a mild cleansing agent used in many skincare and hair care products. It helps water mix with oil and dirt so they can be rinsed away easily. Because it is less harsh than traditional soaps, it is often found in gentle cleansers designed for sensitive or dry 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
Laureth-10 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.
- Step 1Start with the score, then check the irritation and clogging risk before judging Laureth-10 Carboxylic Acid.
- 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 lauric acid (from coconut or palm oil) with ethylene oxide, then converting the result into a carboxylic acid form. It belongs to the ether carboxylic acid family, known for mild cleansing properties.
How it works
It lowers the surface tension between water and oil, allowing water to lift away sebum, makeup, and impurities. Its mildness comes from its large, gentle molecular structure, which is less likely to strip the skin's natural moisture barrier compared to stronger sulfates.
Pros
Gentle on skin
Laureth-10 Carboxylic Acid is much milder than traditional sulfates like SLS, making it a good choice for daily cleansing without over-drying.
Supports moisture retention
Because it cleans without stripping the skin's natural oils, it helps maintain a healthy moisture barrier, which is especially beneficial for dry or compromised skin.
Cons and cautions
Potential for slight dryness at high levels
In formulas with very high concentrations (above 10%), some users may experience mild tightness or dryness, though this is uncommon in well-formulated products.
Ethoxylation concerns
The manufacturing process involves ethylene oxide, which has raised environmental and purity concerns. However, reputable brands ensure the final ingredient is purified to safe levels.
Best for
- People with dry or sensitive skin looking for a gentle cleanser
- Those who prefer sulfate-free cleansing options
Use caution if
- Individuals with known allergies to ethoxylated ingredients (rare)
Usage tips
Safety summary
Laureth-10 Carboxylic Acid is considered safe for use in cosmetics at typical concentrations. It has low irritation and sensitization potential. As with any ethoxylated ingredient, trace levels of 1,4-dioxane can form during manufacturing, but reputable suppliers purify the ingredient to meet safety standards.
Research notes
Studies on ether carboxylic acids, including laureth-10 carboxylic acid, show they are mild surfactants with good skin compatibility. Research indicates they cause less barrier disruption compared to sodium lauryl sulfate. However, direct clinical studies on this specific compound are limited.
Common label clues
- Typical concentration
- 1–10% in rinse-off products; lower in leave-on formulas
- Regulatory status
- Approved for use in cosmetics by the FDA and EU CosIng database. No known restrictions at typical use levels.
- Common uses
- Facial cleansers, Body washes, Shampoos, Micellar waters
- Environmental note
- Derived from plant-based lauric acid and ethylene oxide. While the ethoxylation process has environmental considerations, the ingredient itself is biodegradable and generally considered low-impact.
Good to know
- Laureth-10 Carboxylic Acid is often used in micellar waters because of its ability to gently lift makeup and impurities.
- It is considered biodegradable and is commonly used in eco-friendly formulations.
Common questions
What is Laureth-10 Carboxylic Acid in beauty products?
Laureth-10 Carboxylic Acid is a mild cleansing agent used in many skincare and hair care products. It helps water mix with oil and dirt so they can be rinsed away easily. Because it is less harsh than traditional soaps, it is often found in gentle cleansers designed for sensitive or dry skin.
What does Laureth-10 Carboxylic Acid do in a beauty product?
It lowers the surface tension between water and oil, allowing water to lift away sebum, makeup, and impurities. Its mildness comes from its large, gentle molecular structure, which is less likely to strip the skin's natural moisture barrier compared to stronger sulfates.
Is Laureth-10 Carboxylic Acid safe for most people?
Laureth-10 Carboxylic Acid is considered safe for use in cosmetics at typical concentrations. It has low irritation and sensitization potential. As with any ethoxylated ingredient, trace levels of 1,4-dioxane can form during manufacturing, but reputable suppliers purify the ingredient to meet safety standards.
Who should be careful with Laureth-10 Carboxylic Acid?
Individuals with known allergies to ethoxylated ingredients (rare)
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.