Ingredient review
Laureth-10
INCI: Laureth-10
A gentle cleansing and emulsifying ingredient that helps products rinse clean without stripping the skin, but may not suit those avoiding ethoxylated compounds.
In plain English
Laureth-10 is a mild cleansing and mixing ingredient used in many soaps, shampoos, and lotions. It helps oil and water blend together so the product feels smooth and rinses off easily. Because it's made from lauryl alcohol (from coconut or palm oil) and ethylene oxide, it's considered a gentle surfactant that cleans without being harsh. However, some people prefer to avoid ingredients processed with ethylene oxide due to trace impurity concerns, though cosmetic-grade Laureth-10 is purified to very low levels.
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 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.
- 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
Laureth-10 is a semi-synthetic surfactant and emulsifier. It belongs to the 'laureth' family, where 'laur' refers to lauryl alcohol (often from coconut or palm oil) and 'eth' indicates ethoxylation (reaction with ethylene oxide). The number 10 means it has an average of 10 ethylene oxide units, which makes it water-soluble and mild.
How it works
In a cosmetic product, Laureth-10 reduces the surface tension between oil and water, allowing them to mix into a stable emulsion. As a surfactant, it also helps lift dirt, oil, and makeup from the skin or hair so they can be rinsed away with water. Its mildness comes from its large, gentle molecular structure that doesn't strip the skin's natural moisture barrier as aggressively as stronger cleansers like sodium lauryl sulfate.
Pros
Mild on skin
Laureth-10 is much gentler than common sulfates, making it a good choice for daily cleansers that don't strip natural oils.
Effective emulsifier
It helps create stable, creamy formulas that feel luxurious and rinse cleanly without residue.
Cons and cautions
Ethoxylation concerns
The manufacturing process can produce trace amounts of 1,4-dioxane, a potential carcinogen, though cosmetic-grade ingredients are purified to meet safety limits.
Not natural
As a semi-synthetic ingredient, it may not appeal to those seeking 100% natural or biodegradable formulations.
Best for
- People with normal to dry skin looking for a gentle cleanser
- Those who prefer mild, non-stripping surfactants in shampoos and body washes
Use caution if
- Individuals who strictly avoid any ethoxylated ingredients due to personal preference
- Those with known allergies to ethylene oxide derivatives (rare)
Usage tips
Safety summary
Laureth-10 is considered safe for use in cosmetics at typical concentrations. The main concern is trace 1,4-dioxane from ethoxylation, but cosmetic-grade ingredients are purified to meet strict safety limits (typically below 10 ppm). The Cosmetic Ingredient Review panel has deemed it safe as used.
Research notes
Studies on laureth surfactants show they are mild to the skin and eyes compared to traditional sulfates. Research on 1,4-dioxane indicates that at the low levels found in cosmetics, the risk is negligible. Most evidence comes from industry safety assessments and regulatory reviews.
Common label clues
- Typical concentration
- 1–5% in rinse-off products; lower in leave-on formulas
- Regulatory status
- Approved for use in cosmetics by the FDA and EU Cosmetic Regulation. The Cosmetic Ingredient Review (CIR) panel has reviewed laureth compounds and found them safe as used, with limits on 1,4-dioxane impurities.
- Common uses
- Cleansers, Shampoos, Body washes, Emulsions
- Environmental note
- Laureth-10 is derived from plant-based lauryl alcohol (often coconut or palm oil) but the ethoxylation process is energy-intensive. It is not readily biodegradable compared to some natural surfactants.
Good to know
- Laureth-10 is often used as a secondary surfactant to boost foam and mildness in sulfate-free cleansers
- The number 10 indicates the average ethylene oxide chain length, which affects water solubility and mildness
Common questions
What is Laureth-10 in beauty products?
Laureth-10 is a mild cleansing and mixing ingredient used in many soaps, shampoos, and lotions. It helps oil and water blend together so the product feels smooth and rinses off easily. Because it's made from lauryl alcohol (from coconut or palm oil) and ethylene oxide, it's considered a gentle surfactant that cleans without being harsh. However, some people prefer to avoid ingredients processed with ethylene oxide due to trace impurity concerns, though cosmetic-grade Laureth-10 is purified to very low levels.
What does Laureth-10 do in a beauty product?
In a cosmetic product, Laureth-10 reduces the surface tension between oil and water, allowing them to mix into a stable emulsion. As a surfactant, it also helps lift dirt, oil, and makeup from the skin or hair so they can be rinsed away with water. Its mildness comes from its large, gentle molecular structure that doesn't strip the skin's natural moisture barrier as aggressively as stronger cleansers like sodium lauryl sulfate.
Is Laureth-10 safe for most people?
Laureth-10 is considered safe for use in cosmetics at typical concentrations. The main concern is trace 1,4-dioxane from ethoxylation, but cosmetic-grade ingredients are purified to meet strict safety limits (typically below 10 ppm). The Cosmetic Ingredient Review panel has deemed it safe as used.
Who should be careful with Laureth-10?
Individuals who strictly avoid any ethoxylated ingredients due to personal preference Those with known allergies to ethylene oxide derivatives (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.