Ingredient review
Sodium Myreth Sulfate
INCI: Sodium Myreth Sulfate
A milder alternative to SLS that effectively cleanses but may still be drying for sensitive skin.
In plain English
Sodium Myreth Sulfate is a cleansing ingredient that helps water mix with oil and dirt so they can be rinsed away. It is chemically similar to Sodium Lauryl Sulfate (SLS) but is considered gentler because it has a larger molecular structure that is less penetrating to the skin. It creates a rich lather and is commonly used in shampoos and body washes.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is useful, but some claims depend heavily on the formula.
Main practical flags: irritation is moderate; clogging risk is low.
- Source
- synthetic
- Evidence
- moderate
- Irritation
- moderate
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Sodium Myreth Sulfate can be useful, but watch for some irritation potential.
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 Sodium Myreth Sulfate.
- 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
moderateCan bother some users, especially with frequent use, damaged skin, or strong companion ingredients.
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
Sodium Myreth Sulfate is a synthetic surfactant derived from coconut or palm oil. It is produced by ethoxylating fatty alcohols and then sulfating them, resulting in a milder cleansing agent compared to Sodium Lauryl Sulfate.
How it works
It reduces the surface tension between water and oils, allowing dirt, sebum, and other impurities to be emulsified and washed away. Its larger molecular size makes it less irritating than SLS while still providing effective foaming and cleansing.
Pros
Milder than SLS
Its larger molecular structure makes it less likely to strip the skin's natural moisture barrier compared to Sodium Lauryl Sulfate.
Effective foaming
Produces a satisfying lather that helps distribute the product evenly and gives a sensory clean feel.
Cons and cautions
Potential for irritation
Despite being milder, it can still cause dryness, redness, or irritation for those with compromised or very sensitive skin.
Ethoxylation concerns
The manufacturing process can generate trace amounts of 1,4-dioxane, a possible carcinogen, though levels are typically low and regulated.
Best for
- People with normal to oily skin or hair
- Those who prefer a foaming cleanser but find SLS too harsh
Use caution if
- Individuals with very dry, sensitive, or eczema-prone skin
- Those who avoid ethoxylated ingredients
Usage tips
Safety summary
Sodium Myreth Sulfate is considered safe for use in rinse-off cosmetics at typical concentrations. It is less irritating than SLS but may still cause dryness in sensitive individuals. Trace contaminants like 1,4-dioxane are regulated to low levels.
Research notes
Studies indicate that Sodium Myreth Sulfate has lower skin irritation potential compared to Sodium Lauryl Sulfate. However, long-term safety data is limited, and most evidence comes from industry testing and regulatory reviews.
Common label clues
- Typical concentration
- 1–15% in rinse-off products
- Regulatory status
- Approved for use in cosmetics by the FDA and the European Commission, with concentration limits for rinse-off products.
- Common uses
- Shampoos, Body washes, Facial cleansers, Shower gels
- Environmental note
- Derived from renewable plant sources (coconut or palm oil), but the ethoxylation process has environmental considerations regarding biodegradability and byproducts.
Good to know
- Sodium Myreth Sulfate is often listed as 'Sodium Myreth Sulfate' on labels and is sometimes abbreviated as SME.
- It is commonly found in 'sulfate-free' claims? Actually, it is a sulfate, so products containing it are not truly sulfate-free.
Common questions
What is Sodium Myreth Sulfate in beauty products?
Sodium Myreth Sulfate is a cleansing ingredient that helps water mix with oil and dirt so they can be rinsed away. It is chemically similar to Sodium Lauryl Sulfate (SLS) but is considered gentler because it has a larger molecular structure that is less penetrating to the skin. It creates a rich lather and is commonly used in shampoos and body washes.
What does Sodium Myreth Sulfate do in a beauty product?
It reduces the surface tension between water and oils, allowing dirt, sebum, and other impurities to be emulsified and washed away. Its larger molecular size makes it less irritating than SLS while still providing effective foaming and cleansing.
Is Sodium Myreth Sulfate safe for most people?
Sodium Myreth Sulfate is considered safe for use in rinse-off cosmetics at typical concentrations. It is less irritating than SLS but may still cause dryness in sensitive individuals. Trace contaminants like 1,4-dioxane are regulated to low levels.
Who should be careful with Sodium Myreth Sulfate?
Individuals with very dry, sensitive, or eczema-prone skin Those who avoid ethoxylated ingredients
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.