Ingredient review
PEG/PPG-160/31 Copolymer
INCI: PEG/PPG-160/31 Copolymer
A safe, synthetic thickener that improves product texture and spreadability without common irritation.
In plain English
PEG/PPG-160/31 Copolymer is a man-made ingredient that helps skincare products feel smooth and spread easily. It acts like a sponge, holding onto water and other ingredients to create a nice, even texture. You won't see it listed as a star ingredient, but it's a workhorse that makes your lotions and serums feel pleasant to use.
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/PPG-160/31 Copolymer 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/PPG-160/31 Copolymer.
- 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 synthetic polymer made from repeating units of ethylene glycol (PEG) and propylene glycol (PPG). The numbers 160 and 31 refer to the average number of repeating units, which determines its properties as a thickener and emulsifier.
How it works
It dissolves in water and forms a gel-like network that thickens the product. It also helps oil and water mix together (emulsification) and leaves a thin, flexible film on the skin that can improve the feel of other ingredients.
Pros
Improves texture
Makes creams and serums feel smooth and silky, not sticky or heavy, so you enjoy applying them.
Stable and gentle
Works well in many formulas and has a very low risk of irritation or clogging pores, making it suitable for sensitive skin.
Cons and cautions
Synthetic origin
It is made in a lab, which may be a turn-off if you prefer only natural or plant-derived ingredients.
Can feel tacky at high levels
If used in very high amounts, it can leave a slightly sticky or tacky feeling on the skin, though this is rare in well-made products.
Best for
- Anyone looking for a well-formulated, cosmetically elegant product
- People with normal to oily skin who prefer lightweight textures
Use caution if
- Those who strictly avoid all synthetic or PEG-based ingredients
Usage tips
Safety summary
PEG/PPG-160/31 Copolymer is considered safe for use in cosmetics at typical concentrations. It has a low irritation and comedogenic risk. Some consumers may choose to avoid PEG compounds due to concerns about potential contamination with ethylene oxide or 1,4-dioxane during manufacturing, but reputable brands ensure these impurities are removed.
Research notes
There is limited direct research on this specific copolymer, but the broader class of PEG/PPG polymers has been reviewed by the Cosmetic Ingredient Review (CIR) panel and found safe for cosmetic use. Studies show they are not significantly absorbed through the skin and have low toxicity.
Common label clues
- Typical concentration
- 0.5% to 5%
- Regulatory status
- Approved for use in cosmetics by the FDA and the European Commission. The Cosmetic Ingredient Review (CIR) panel has reviewed similar PEG/PPG copolymers and found them safe as used.
- Common uses
- Serums, Moisturizers, Sunscreens, Hair products
- Environmental note
- As a synthetic polymer, it is not biodegradable. However, it is used in small amounts and is not known to accumulate in the environment.
Good to know
- PEG/PPG copolymers are common in many cosmetics and are considered safe by major regulatory bodies.
- The numbers (160/31) indicate the polymer chain length, which affects how it behaves in a formula.
Common questions
What is PEG/PPG-160/31 Copolymer in beauty products?
PEG/PPG-160/31 Copolymer is a man-made ingredient that helps skincare products feel smooth and spread easily. It acts like a sponge, holding onto water and other ingredients to create a nice, even texture. You won't see it listed as a star ingredient, but it's a workhorse that makes your lotions and serums feel pleasant to use.
What does PEG/PPG-160/31 Copolymer do in a beauty product?
It dissolves in water and forms a gel-like network that thickens the product. It also helps oil and water mix together (emulsification) and leaves a thin, flexible film on the skin that can improve the feel of other ingredients.
Is PEG/PPG-160/31 Copolymer safe for most people?
PEG/PPG-160/31 Copolymer is considered safe for use in cosmetics at typical concentrations. It has a low irritation and comedogenic risk. Some consumers may choose to avoid PEG compounds due to concerns about potential contamination with ethylene oxide or 1,4-dioxane during manufacturing, but reputable brands ensure these impurities are removed.
Who should be careful with PEG/PPG-160/31 Copolymer?
Those who strictly avoid all synthetic or PEG-based 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.