Ingredient review
Acrylic Acid/Acrylonitrogens Copolymer
INCI: ACRYLIC ACID/ACRYLONITROGENS COPOLYMER
A synthetic polymer that helps products stay put and resist water, but offers no active skincare benefit.
In plain English
This is a man-made ingredient that forms a thin, flexible film on your skin. It helps makeup and sunscreen stay in place longer and resist water or sweat. Think of it like a clear, breathable plastic wrap that holds the product where you put it. It doesn't moisturize or treat skin—it's purely a texture and performance helper.
Quick decision guide
Useful, but context matters
Acrylic Acid/Acrylonitrogens 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 Acrylic Acid/Acrylonitrogens 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 copolymer created by combining acrylic acid with acrylonitrogens (a type of nitrogen-containing monomer). It is a white powder or liquid that is added to formulas to create a film or adjust thickness.
How it works
When applied to the skin, the copolymer dries to form a continuous, flexible film. This film locks in other ingredients, reduces transfer, and improves water resistance. It also slightly thickens the product, giving it a richer feel.
Pros
Boosts wear time
Helps makeup and sunscreen stay put for hours, even in heat or humidity, so you don't have to reapply as often.
Water-resistant
Creates a barrier that resists water and sweat, making it ideal for swimming, exercise, or rainy days.
Cons and cautions
No skincare benefit
This ingredient doesn't hydrate, soothe, or treat skin—it's purely a performance enhancer, so it won't improve your skin's health.
Potential tightness
The film can feel slightly tight or dry on very dry or sensitive skin, especially if used in high concentrations.
Best for
- People who want long-lasting, waterproof makeup
- Those using water-resistant sunscreens for outdoor activities
Use caution if
- Individuals with very dry or dehydrated skin who prefer hydrating formulas
- Anyone avoiding synthetic polymers for environmental reasons
Usage tips
Safety summary
Considered safe for topical use at typical cosmetic concentrations. Low irritation and comedogenic risk. No known toxicity concerns from regulatory bodies like the Cosmetic Ingredient Review (CIR) or EU SCCS.
Research notes
Limited peer-reviewed studies specifically on this copolymer, but it is structurally similar to other safe film-forming polymers. The CIR has reviewed related acrylic copolymers and found them safe for cosmetic use.
Common label clues
- Typical concentration
- 0.5% to 5%
- Regulatory status
- Approved for use in cosmetics in the EU, US, and most major markets. No known restrictions at typical use levels.
- Common uses
- Sunscreens, Waterproof makeup, Long-wear foundations
- Environmental note
- As a synthetic polymer, it is not readily biodegradable. Some manufacturers are exploring bio-based alternatives to reduce environmental impact.
Good to know
- This polymer is often listed near the end of ingredient lists because it's used in small amounts.
- It is not the same as microplastics used in exfoliating scrubs; it's a film-former that stays on the skin's surface.
Common questions
What is Acrylic Acid/Acrylonitrogens Copolymer in beauty products?
This is a man-made ingredient that forms a thin, flexible film on your skin. It helps makeup and sunscreen stay in place longer and resist water or sweat. Think of it like a clear, breathable plastic wrap that holds the product where you put it. It doesn't moisturize or treat skin—it's purely a texture and performance helper.
What does Acrylic Acid/Acrylonitrogens Copolymer do in a beauty product?
When applied to the skin, the copolymer dries to form a continuous, flexible film. This film locks in other ingredients, reduces transfer, and improves water resistance. It also slightly thickens the product, giving it a richer feel.
Is Acrylic Acid/Acrylonitrogens Copolymer safe for most people?
Considered safe for topical use at typical cosmetic concentrations. Low irritation and comedogenic risk. No known toxicity concerns from regulatory bodies like the Cosmetic Ingredient Review (CIR) or EU SCCS.
Who should be careful with Acrylic Acid/Acrylonitrogens Copolymer?
Individuals with very dry or dehydrated skin who prefer hydrating formulas Anyone avoiding synthetic polymers for environmental reasons
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.