Ingredient review
PEG-75 Dioleate
INCI: PEG-75 Dioleate
A reliable emulsifier that helps mix water and oil, but may not suit those avoiding ethoxylated ingredients.
In plain English
PEG-75 Dioleate is a synthetic ingredient that helps oil and water blend together in products like lotions and cleansers. The 'PEG' part means it's made with ethylene oxide, a process that can create trace impurities if not properly purified. In well-formulated products, it's generally considered safe and gentle.
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
- synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
PEG-75 Dioleate 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 PEG-75 Dioleate.
- 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 polyethylene glycol (PEG) derivative of dioleic acid, used as an emulsifier and surfactant in cosmetics.
How it works
It reduces surface tension between oil and water, allowing them to mix into a stable, creamy emulsion. This helps products feel smooth and spread evenly.
Pros
Effective emulsifier
Creates stable, smooth emulsions that improve product texture and feel.
Low irritation risk
Generally well-tolerated on skin, with low irritation and comedogenic scores.
Cons and cautions
Ethoxylation concerns
The manufacturing process can produce trace levels of 1,4-dioxane, a potential contaminant, though reputable brands purify it out.
Not eco-friendly
PEG compounds are not readily biodegradable and may persist in the environment.
Best for
- People using conventional lotions and cleansers
- Those who want smooth, stable formulas
Use caution if
- Individuals avoiding PEGs or ethoxylated ingredients
- Those with very sensitive or reactive skin
Usage tips
Safety summary
PEG-75 Dioleate is considered safe in cosmetics when properly purified. The main concern is potential contamination with 1,4-dioxane, but reputable manufacturers keep levels within safe limits. It has low irritation and comedogenic potential.
Research notes
Studies show PEG derivatives are safe at typical cosmetic concentrations. The Cosmetic Ingredient Review (CIR) panel has reviewed PEG compounds and found them safe as used, with the caveat that impurities should be minimized.
Common label clues
- Typical concentration
- 0.5% to 5%
- Regulatory status
- Approved for use in cosmetics by the FDA and EU CosIng database, with concentration limits for impurities.
- Common uses
- Cleansers, Lotions, Creams, Conditioners
- Environmental note
- PEG compounds are synthetic and not readily biodegradable; they can accumulate in aquatic environments.
Good to know
- PEG-75 Dioleate is often used in rinse-off products like cleansers and conditioners.
- The number '75' refers to the average polymer length, affecting its solubility and feel.
Common questions
What is PEG-75 Dioleate in beauty products?
PEG-75 Dioleate is a synthetic ingredient that helps oil and water blend together in products like lotions and cleansers. The 'PEG' part means it's made with ethylene oxide, a process that can create trace impurities if not properly purified. In well-formulated products, it's generally considered safe and gentle.
What does PEG-75 Dioleate do in a beauty product?
It reduces surface tension between oil and water, allowing them to mix into a stable, creamy emulsion. This helps products feel smooth and spread evenly.
Is PEG-75 Dioleate safe for most people?
PEG-75 Dioleate is considered safe in cosmetics when properly purified. The main concern is potential contamination with 1,4-dioxane, but reputable manufacturers keep levels within safe limits. It has low irritation and comedogenic potential.
Who should be careful with PEG-75 Dioleate?
Individuals avoiding PEGs or ethoxylated ingredients Those with very sensitive or reactive skin
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.