Also on labels as: Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Carbomer (not identical but related), acrylic acid polymer
In one line
A synthetic polymer blend used to thicken, stabilise, and create film-forming texture in cosmetics.
What is Acrylates Copolymer?
Acrylates Copolymer is a man-made plastic-type polymer created by linking two or more acrylic acid or methacrylate monomers together through a chemical process called copolymerisation. It does not come from any natural source. The result is a versatile, water-dispersible resin that behaves differently depending on its exact monomer composition and molecular weight.
What does it do in the product?
In liquid and semi-solid formulas, it acts as a thickener and rheology modifier, giving products a smooth, gel-like consistency that spreads evenly. In leave-on products such as hair gels or nail polish, it forms a thin, flexible film that helps the formula stay in place. It also helps suspend other ingredients and stabilise emulsions so they do not separate over time.
Where you usually find it
Sunscreens and SPF moisturisers
Hair styling gels and sprays
Nail polish and long-wear foundations
Waterproof mascaras
Leave-on skincare serums
Is Acrylates Copolymer something to worry about?
For most people, finished cosmetic products containing acrylates copolymer are considered low-risk because the polymer is too large to penetrate skin readily. Concerns arise mainly around residual unreacted monomers, particularly in people with existing acrylic sensitivity, since those monomers can occasionally trigger contact dermatitis. Occupational exposure during manufacturing is a separate and more significant issue than consumer-level use.
Who should pay attention
People with known acrylic or methacrylate allergies — patch reactions are possible
Nail technicians or frequent gel-nail users with sensitised skin
Those with eczema or compromised skin barriers, where even low-level irritants can matter
Anyone avoiding synthetic polymers for environmental reasons, as these do not biodegrade readily
People with fragrance or preservative sensitivities should check other ingredients listed alongside it
How is it regulated?
In the United States, the FDA permits acrylates copolymer as a cosmetic ingredient and it is reviewed under the Cosmetic Ingredient Review panel process, which has found it safe at typical use concentrations. In the European Union, it is permitted in cosmetics under the general safety provisions of the EU Cosmetics Regulation, with no current restriction or ban, though EFSA and the Scientific Committee on Consumer Safety periodically reassess polymer ingredients as new data emerge.
How to spot it on a label
You will usually see it listed as 'Acrylates Copolymer' or with a longer modifier such as 'Acrylates/C10-30 Alkyl Acrylate Crosspolymer', which indicates a cross-linked version with slightly different properties. Its position in the ingredient list reflects its concentration — appearing in the middle to lower section usually signals a functional but non-dominant amount. When it appears near UV filters on a sunscreen label, it is likely serving as the primary texture-building agent.
What a cleaner swap looks like
Consumers preferring to avoid synthetic acrylic polymers can look for formulas thickened with plant-derived gums such as xanthan gum, hydroxyethylcellulose, or sclerotium gum, all of which provide similar gel-like textures. For film-forming in hair products, some brands use shellac or plant-based resins as alternatives, though these come with their own sensitivities to consider. Reading the INCI list carefully and scanning with InZoRAH can help confirm whether a 'natural' label actually avoids synthetic polymers.
Questions people also ask about Acrylates Copolymer
Is acrylates copolymer safe to use on skin every day?
For most people, yes. Regulatory reviews in both the US and EU have found it safe at typical cosmetic concentrations. The polymer molecule is generally considered too large to penetrate the skin barrier meaningfully. Those with acrylic sensitivities should be more cautious and consider patch testing new products.
Can acrylates copolymer cause an allergic reaction?
It can in people who are already sensitised to acrylates or methacrylates, a group that includes some nail technicians and frequent gel-nail users. The reaction is usually contact dermatitis — redness, itching or swelling at the application site. If you have a known acrylic allergy, avoid products where it appears high in the ingredient list.
Is acrylates copolymer a microplastic?
It sits in a regulatory grey area. As a synthetic polymer, it shares chemical kinship with plastics, and some environmental advocates classify certain cosmetic polymers as microplastics of concern. The EU has been tightening rules on intentionally added microplastics in rinse-off products, but leave-on polymer use is still being evaluated. The science on environmental impact is still developing.
Why does it appear in so many sunscreens?
Sunscreens need to spread evenly, stay put after application, and remain stable while UV filters do their job. Acrylates copolymer accomplishes all three — it thickens the base, helps the product resist water and sweat, and suspends mineral or chemical UV filters uniformly throughout the formula, improving both texture and performance.
Is acrylates copolymer vegan and cruelty-free?
The ingredient itself is synthetic and contains no animal-derived components, so it is considered vegan. Whether a specific product is cruelty-free depends on the brand's overall testing policy, not on this individual ingredient. Always check the brand's cruelty-free certification separately from the ingredient list.
What is the difference between acrylates copolymer and carbomer?
Both are acrylic-based thickeners, but they are not the same. Carbomer is specifically a cross-linked polyacrylic acid homopolymer, while acrylates copolymer is built from at least two different monomer types. This gives them slightly different texture profiles and compatibilities, which is why formulators sometimes choose one over the other depending on the product's pH and finish.
Where this came from
Cosmetic Ingredient Review (CIR) safety assessment process — Supports the finding that acrylates copolymer is considered safe at typical cosmetic use levels for most consumers
EU Cosmetics Regulation (general safety provisions) — Confirms the ingredient is permitted in EU cosmetics with no current specific restriction, subject to ongoing review
EU regulatory framework on intentionally added microplastics in cosmetics — Provides context for the ongoing environmental debate around synthetic polymers in personal care products
Dermatology literature on contact sensitisation to acrylates — Supports the link between acrylic/methacrylate sensitivity and potential contact dermatitis reactions in susceptible individuals
Original write-up based on public records. Educational information, not medical advice — ingredient records change, so always read the physical label if you have an allergy.
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