Is Styrene Acrylates Copolymer safe on skin (left on)?
Cosmetics1 use researched5 sourced claims
Where it turns up: film former, eyeliner, mascara adhesion. Detox My Life researched styrene acrylates copolymer under one use, because the same substance means something different in each use. Every claim below carries its evidence tier, how sure the research is that it applies here, and the sources it cites. The level is computed by the app's own deterministic engine, so the page says exactly what the app would.
Level by use and lens
| Use | Mainstream | Cautious (default) | Based | Concerns · favour · fringe |
|---|
| On skin, left on | Swap | Swap | Swap | 5 · 0 |
Mainstream shows consensus claims only; Cautious adds emerging research; Based adds fringe claims, labelled as such. The last column counts, under Cautious, the sourced concerns, the findings in its favour and the fringe claims Based would add.
Safer swaps: the app's swap catalog has no entry tied to this ingredient yet. When you scan a product that contains it, the app suggests cleaner alternative types for that product; the swap categories list what the catalog covers today.
On skin, left on Swap
Under the default Cautious lens styrene acrylates copolymer on skin (left on) rates Swap: the app would put this near the top of your swap plan. Mainstream (consensus only) rates it Swap; Based (adds the fringe) rates it Swap. Researched 2026-09-03.
Sourced concerns (5)
ConsensusRestrictedconfidence 90%
Styrene/acrylates copolymer (nano) and sodium styrene/acrylates copolymer (nano) are banned for use in cosmetic products in the European Union, with a 'placing on the market' deadline of February 1, 2025, and a 'making available on the market' deadline of November 1, 2025, due to concerns about potential toxicity if nanoparticles enter cells.
- Why here
- This is a direct regulatory restriction for the nano form of the ingredient in leave-on cosmetics, indicating a safety concern for this exposure route.
- What would have to be true
- Use of leave-on cosmetic products containing styrene/acrylates copolymer in nano form.
Sources the engine cites (no regulator, review or study among them):
- 2 web articles (allanchem.com, lawbc.com), linked in the app.
ConsensusEnvironmentalconfidence 90%
Styrene/Acrylates Copolymer is classified as a microplastic by the European Commission and contributes to microplastic pollution, as these polymers are not biodegradable.
- Why here
- Even in leave-on products, the ingredient can be washed off or enter the environment, contributing to microplastic pollution.
- What would have to be true
- Use of cosmetic products containing styrene acrylates copolymer, leading to its release into the environment.
Sources the engine cites (no regulator, review or study among them):
- 2 web articles (r10labs.com, vitisv.com.au), linked in the app.
- 1 community or commercial page, not counted here.
EmergingSuspected carcinogenconfidence 90%
Styrene acrylates copolymer may contain residual styrene, which is classified as a reasonably anticipated human carcinogen by the International Agency for Research on Cancer (IARC Group 2A: probably carcinogenic to humans) and the National Toxicology Program, and is listed on California Proposition 65 as a known carcinogen.
- Why here
- Residual styrene, a small molecule, can be present in leave-on cosmetic products containing styrene acrylates copolymer and has the potential for dermal absorption.
- What would have to be true
- Dermal exposure to leave-on cosmetic products containing styrene acrylates copolymer with trace amounts of residual styrene.
Sources the engine cites (no regulator, review or study among them):
- 1 community or commercial page, not counted here.
EmergingEndocrineconfidence 90%
Styrene acrylates copolymer may contain residual styrene, which the European Commission on Endocrine Disruption classifies as a Category 1 endocrine disruptor, meaning evidence for endocrine disruption has been documented in humans and wildlife.
- Why here
- Residual styrene, a small molecule, can be present in leave-on cosmetic products containing styrene acrylates copolymer and has the potential for dermal absorption.
- What would have to be true
- Dermal exposure to leave-on cosmetic products containing styrene acrylates copolymer with trace amounts of residual styrene.
Sources the engine cites (no regulator, review or study among them):
- 1 community or commercial page, not counted here.
EmergingEnvironmentalconfidence 80%
While most microplastic particles are too large to cross intact skin, nanoplastics (<1 µm) may penetrate under some conditions, and the chemicals carried by microplastics (such as BPA, phthalates, and PFAS) can absorb through the skin.
- Why here
- Styrene acrylates copolymer is classified as a microplastic, and its presence in leave-on products raises concerns about potential dermal absorption of nanoplastic forms or associated chemical additives, especially with damaged skin.
- What would have to be true
- Dermal exposure to leave-on cosmetic products containing styrene acrylates copolymer, particularly in nano-sized forms or when skin is damaged.
Sources the engine cites:
Not researched here
The engine has no dossier for styrene acrylates copolymer when cooked with heat, in cold food, as a finishing ingredient, in heated food packaging or other uses. The app researches an ingredient for the use it infers from your product, so a scan fills these in; this page only shows what has already been researched and source-verified.
This is research, not medical advice. Detox My Life shows sourced claims sorted by evidence tier. It does not diagnose, treat, or tell you to start or stop anything. Talk to a qualified professional about your health.
Scan your own. The app reads any product label with your camera, works out how you are about to use it, and researches every ingredient for that use with live sources. Every scan adds to a Detox Score for your home, where 50 is a typical home in your region, and a plan of next swaps.
See also: all ingredients · paste a label to check it · how to read an ingredient flag
