Ingredient review
Ethyl PEG-15 Cocamine Sulfate
INCI: ETHYL PEG-15 COCAMINE SULFATE
A gentle, coconut-derived surfactant that cleanses effectively but may not suit ultra-sensitive scalps in high concentrations.
In plain English
Ethyl PEG-15 Cocamine Sulfate is a mild cleansing ingredient made from coconut oil. It helps create a nice lather in shampoos and body washes while being less harsh than some traditional sulfates. The 'PEG-15' part means it has been modified to be water-soluble and gentle on 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
Ethyl PEG-15 Cocamine Sulfate 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 Ethyl PEG-15 Cocamine 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
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 created by reacting coconut oil-derived amines with ethylene oxide and sulfuric acid. It belongs to the class of alkyl ether sulfates, known for their mild cleansing properties.
How it works
It reduces the surface tension between water and oil, allowing dirt and excess sebum to be rinsed away. Its large molecular structure makes it less penetrating into the skin barrier, which lowers irritation potential compared to smaller surfactants like SLS.
Pros
Gentle on skin
Its large molecular structure means it stays mostly on the skin's surface, reducing irritation risk compared to harsher sulfates like sodium lauryl sulfate.
Effective foaming
Produces a satisfying lather that helps spread the product evenly, making it a popular choice in shampoos and body washes.
Cons and cautions
Not fully natural
Although derived from coconut oil, it undergoes chemical modification (ethoxylation and sulfation), which may not appeal to those seeking purely natural ingredients.
Potential for buildup
In very hard water or with infrequent washing, the PEG component may leave a slight residue on hair or skin for some users.
Best for
- People with normal to combination skin looking for a gentle foaming cleanser
- Those who prefer sulfate-free but still foaming formulas
Use caution if
- Individuals with known coconut oil allergies (rare)
- Those seeking completely biodegradable or natural-only formulations
Usage tips
Safety summary
Generally considered safe for most skin types when used in rinse-off products at typical concentrations. Mild irritation is possible for very sensitive individuals, but it is far gentler than traditional sulfates.
Research notes
Studies on similar PEG-modified sulfates show low skin irritation and sensitization potential. No specific long-term human studies exist for this exact compound, but the class is well-documented as safe in cosmetic use.
Common label clues
- Typical concentration
- 1–10% in rinse-off products
- Regulatory status
- Approved for use in cosmetics in the EU, US, and other major markets. The Cosmetic Ingredient Review (CIR) panel has evaluated similar alkyl ether sulfates as safe when formulated to be non-irritating.
- Common uses
- Shampoos, Body washes, Facial cleansers, Foaming bath products
- Environmental note
- The PEG chain makes it less biodegradable than simpler surfactants, but it is not classified as a persistent environmental pollutant. Some manufacturers are moving to greener alternatives.
Good to know
- PEG-15 indicates the average number of ethylene oxide units, which helps the ingredient dissolve in water.
- This ingredient is often found in 'sulfate-free' shampoos, though it is technically a sulfate—just a milder one.
Common questions
What is Ethyl PEG-15 Cocamine Sulfate in beauty products?
Ethyl PEG-15 Cocamine Sulfate is a mild cleansing ingredient made from coconut oil. It helps create a nice lather in shampoos and body washes while being less harsh than some traditional sulfates. The 'PEG-15' part means it has been modified to be water-soluble and gentle on skin.
What does Ethyl PEG-15 Cocamine Sulfate do in a beauty product?
It reduces the surface tension between water and oil, allowing dirt and excess sebum to be rinsed away. Its large molecular structure makes it less penetrating into the skin barrier, which lowers irritation potential compared to smaller surfactants like SLS.
Is Ethyl PEG-15 Cocamine Sulfate safe for most people?
Generally considered safe for most skin types when used in rinse-off products at typical concentrations. Mild irritation is possible for very sensitive individuals, but it is far gentler than traditional sulfates.
Who should be careful with Ethyl PEG-15 Cocamine Sulfate?
Individuals with known coconut oil allergies (rare) Those seeking completely biodegradable or natural-only formulations
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.