Ingredient review
PEG/PPG-150/35 Copolymer
INCI: PEG/PPG-150/35 COPOLYMER
A safe, synthetic thickener that helps create a smooth, spreadable texture in cleansers and lotions, but offers no active skin benefits.
In plain English
PEG/PPG-150/35 Copolymer is a man-made ingredient that helps water-based products feel thicker and more luxurious. It works by linking water molecules together, which gives gels and creams a smooth, non-sticky feel. You'll find it in many cleansers and shampoos to improve texture and make the product easier to spread. It doesn't actively treat skin or hair, but it makes the formula more 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-150/35 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-150/35 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 150 and 35 refer to the average number of repeating units in each block, which determines its thickening and emulsifying properties.
How it works
When added to water, the polymer chains unwind and entangle, increasing the viscosity of the solution. This creates a thicker, more stable gel or cream. It also helps oil and water mix together (emulsification), preventing separation in products like lotions.
Pros
Improves texture
Creates a smooth, non-sticky feel in cleansers and lotions, making them easier to apply and more pleasant to use.
Stabilizes formulas
Helps keep oil and water mixed together, so your product stays consistent and doesn't separate over time.
Cons and cautions
Synthetic origin
Made from petroleum-derived materials, which may not align with a natural or minimalist skincare philosophy.
No active benefits
Does not hydrate, exfoliate, or treat skin concerns—it only improves the feel and stability of the product.
Best for
- Anyone looking for a smooth, non-sticky cleanser or lotion
- People with normal to oily skin who prefer lightweight textures
Use caution if
- Those seeking only natural or organic ingredients
- Individuals with known sensitivity to PEG compounds (rare)
Usage tips
Safety summary
PEG/PPG-150/35 Copolymer is considered safe for use in cosmetics at typical concentrations. It has low irritation and comedogenic potential. Some consumers avoid PEG compounds due to concerns about ethylene oxide contamination, but cosmetic-grade ingredients are purified to meet safety standards.
Research notes
Safety assessments by the Cosmetic Ingredient Review (CIR) and other bodies have concluded that PEG/PPG copolymers are safe in cosmetics. No significant human or environmental toxicity has been reported at use levels.
Common label clues
- Typical concentration
- 0.5–5%
- 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
- Cleansers, Shampoos, Body washes, Lotions, Serums
- Environmental note
- As a synthetic polymer, it is not biodegradable. However, it is used in low concentrations and is generally removed during wastewater treatment.
Good to know
- PEG/PPG copolymers are widely considered safe in cosmetics at typical use levels.
- The numbers (150/35) indicate the polymer's molecular weight and influence its thickening ability.
Common questions
What is PEG/PPG-150/35 Copolymer in beauty products?
PEG/PPG-150/35 Copolymer is a man-made ingredient that helps water-based products feel thicker and more luxurious. It works by linking water molecules together, which gives gels and creams a smooth, non-sticky feel. You'll find it in many cleansers and shampoos to improve texture and make the product easier to spread. It doesn't actively treat skin or hair, but it makes the formula more pleasant to use.
What does PEG/PPG-150/35 Copolymer do in a beauty product?
When added to water, the polymer chains unwind and entangle, increasing the viscosity of the solution. This creates a thicker, more stable gel or cream. It also helps oil and water mix together (emulsification), preventing separation in products like lotions.
Is PEG/PPG-150/35 Copolymer safe for most people?
PEG/PPG-150/35 Copolymer is considered safe for use in cosmetics at typical concentrations. It has low irritation and comedogenic potential. Some consumers avoid PEG compounds due to concerns about ethylene oxide contamination, but cosmetic-grade ingredients are purified to meet safety standards.
Who should be careful with PEG/PPG-150/35 Copolymer?
Those seeking only natural or organic ingredients Individuals with known sensitivity to PEG compounds (rare)
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.