Ingredient review
PEG-11 Oleate
INCI: PEG-11 Oleate
PEG-11 Oleate is a synthetic emulsifier that helps mix oil and water in products, but it may be mildly irritating for sensitive skin and has moderate comedogenic potential.
In plain English
PEG-11 Oleate is a man-made ingredient that helps oil and water stay blended together in products like lotions and cleansers. It belongs to a family of ingredients called PEGs (polyethylene glycols), which are often used to improve texture and stability. While effective, it can sometimes cause mild irritation or clog pores, especially for those with sensitive or acne-prone 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.
Main practical flags: irritation is moderate; clogging risk is moderate.
- Source
- synthetic
- Evidence
- moderate
- Irritation
- moderate
- Clogging risk
- moderate
Quick decision guide
Useful, but context matters
PEG-11 Oleate can be useful, but watch for some irritation potential and possible clogging concerns.
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 PEG-11 Oleate.
- 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
moderateMay be fine for many users but deserves caution if you are breakout-prone.
Evidence level
moderateThere is useful support, but formula details and claim strength still matter.
What it is
PEG-11 Oleate is a synthetic compound created by reacting polyethylene glycol (PEG) with oleic acid, a fatty acid found in olive oil and other plant oils. It acts as an emulsifier, meaning it helps oil and water mix together so they don't separate in a product.
How it works
In a cosmetic formula, PEG-11 Oleate sits at the boundary between oil and water droplets, reducing surface tension so they can blend into a stable emulsion. This creates a smooth, uniform texture in creams, lotions, and cleansers, and helps the product spread easily on the skin.
Pros
Effective emulsifier
PEG-11 Oleate reliably blends oil and water, preventing product separation and ensuring a consistent texture.
Low use levels
It works well at small concentrations (0.5–5%), so it doesn't dominate a formula's ingredient list.
Cons and cautions
Potential irritation
PEG-11 Oleate can cause mild stinging or redness on sensitive or compromised skin, especially in high concentrations.
Moderate comedogenic risk
It has a moderate chance of clogging pores, which may not be ideal for acne-prone individuals.
Best for
- People with normal to oily skin looking for stable lotions or cleansers
- Those who tolerate synthetic emulsifiers well
Use caution if
- Individuals with very sensitive or reactive skin
- Those prone to clogged pores or acne who prefer non-comedogenic alternatives
Usage tips
Safety summary
PEG-11 Oleate is generally considered safe in cosmetics at low concentrations, but it can cause mild irritation and has moderate comedogenic potential. Purification standards help reduce the risk of contamination with ethylene oxide or 1,4-dioxane.
Research notes
The Cosmetic Ingredient Review (CIR) panel has evaluated PEG compounds and concluded they are safe for use in cosmetics when formulated to be non-irritating and free of significant impurities. Individual studies on PEG-11 Oleate specifically are limited, but its safety profile is consistent with other PEG emulsifiers.
Common label clues
- Typical concentration
- 0.5% to 5%
- Regulatory status
- Approved for use in cosmetics in the US (FDA) and EU (CosIng) at typical concentrations. The Cosmetic Ingredient Review (CIR) panel has reviewed PEGs and found them safe when formulated to minimize impurities.
- Common uses
- Cleansers, Lotions, Creams, Makeup removers
- Environmental note
- PEG-11 Oleate is synthetic and may not be readily biodegradable. Its production involves ethylene oxide, which is derived from fossil fuels.
Good to know
- PEG-11 Oleate is sometimes listed as 'PEG-400 monooleate' on older labels.
- Manufacturers can purify PEGs to remove impurities like 1,4-dioxane, but not all brands disclose this process.
Common questions
What is PEG-11 Oleate in beauty products?
PEG-11 Oleate is a man-made ingredient that helps oil and water stay blended together in products like lotions and cleansers. It belongs to a family of ingredients called PEGs (polyethylene glycols), which are often used to improve texture and stability. While effective, it can sometimes cause mild irritation or clog pores, especially for those with sensitive or acne-prone skin.
What does PEG-11 Oleate do in a beauty product?
In a cosmetic formula, PEG-11 Oleate sits at the boundary between oil and water droplets, reducing surface tension so they can blend into a stable emulsion. This creates a smooth, uniform texture in creams, lotions, and cleansers, and helps the product spread easily on the skin.
Is PEG-11 Oleate safe for most people?
PEG-11 Oleate is generally considered safe in cosmetics at low concentrations, but it can cause mild irritation and has moderate comedogenic potential. Purification standards help reduce the risk of contamination with ethylene oxide or 1,4-dioxane.
Who should be careful with PEG-11 Oleate?
Individuals with very sensitive or reactive skin Those prone to clogged pores or acne who prefer non-comedogenic alternatives
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.