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2-Propenoic acid, 2-methyl-, methyl ester, polymer with butyl 2-propenoate, ethenylbenzene and 2-propenoic acid

CAS 9010-92-8 · 100/100 · High conf.

Also registered as 3 other CAS numbers

25034-86-0 · 25085-34-1 · 27306-39-4

Concern score

100/100Critical concern based on regulatory listings.
High confidence

2-Propenoic acid, 2-methyl-, methyl ester, polymer with butyl 2-propenoate, ethenylbenzene and 2-propenoic acid in plain language

What it is

On cosmetic ingredient lists it appears as “Sodium styrene/acrylates copolymer”.

Also known as Sodium styrene/acrylates copolymer · Styrene/acrylates copolymer

What it does

Used in cosmetics as a film former, an opacifier and a thickener. Sodium Styrene/Acrylates Copolymer is the sodium salt of a polymer of styrene and a monomer consisting of acrylic acid, methacrylic acid or one of their simple esters.

  • Film forming
  • Opacifying
  • Viscosity controlling
Is it a concern?
Critical concern: no hazard classifications on record. It is banned in EU cosmetics.

Why it's flagged

Styrene/Acrylates copolymer (nano) [INCI] Sodium Styrene/Acrylates copolymer (nano) [INCI] is prohibited in cosmetic products under Annex II of the EU Cosmetics Regulation (EC) 1223/2009.

RestrictedEU EC — banned

The score describes this ingredient's chemical identity — its hazard profile from published classifications and regulatory status — not the safety of any product it appears in.

Regulation

Restrictions first, then routine listings from published regulatory sources.

  • EU Annex II — prohibited
  • EU prohibited in cosmetics

Recorded in these product areas

  • Found in consumer products
  • Industrial

  • EUEC

    Annex II of EU Cosmetics Regulation (EC) 1223/2009: substances prohibited in cosmetic products.

    banned
    View source →
  • EUCosIngActive3 entries
    • Sodium Styrene/Acrylates Copolymer is the sodium salt of a polymer of styrene and a monomer consisting of acrylic acid, methacrylic acid or one of their simple esters.Source →
    • Styrene/Acrylates Copolymer is a polymer of Styrene and a monomer consisting of Acrylic Acid, Methacrylic Acid or one of their simple esters.Source →
    • Cosmetics Regulation annex II / ref 1725.Source →
  • USEPAcommercial use observedEPA CPDat observed this chemical in 0 composition records across product categories including unclassified products.
    • EPA CPDat observed this chemical in 0 composition records across product categories including unclassified products.Source →

Expert safety opinions

No expert opinion on file for 2-Propenoic acid, 2-methyl-, methyl ester, polymer with butyl 2-propenoate, ethenylbenzene and 2-propenoic acid. These are the independent scientific bodies that assess ingredients like this one; we show an opinion only when a record we hold cites it.

  • SCCS

    EU Scientific Committee on Consumer Safety

    No SCCS opinion on file.

  • CIR

    Cosmetic Ingredient Review (US expert panel)

    No CIR safety assessment on file.

Evidence & sources

No graded research studies for 2-Propenoic acid, 2-methyl-, methyl ester, polymer with butyl 2-propenoate, ethenylbenzene and 2-propenoic acid yet. This record is compiled from the published data sources below — registries and regulatory listings, not study findings.

4 data sources

Where this comes from

  • CosIng

    regulatory · updated 2026-09-23

    Open →

  • EU CosIng Cosmetics Regulation Annexes

    regulatory · updated 2024-03-18

    Open →

  • EPA Chemical and Products Database

    exposure · updated 2019-05-01

    Open →

  • EPA DSSTox Identifiers

    chemistry · updated 2025-12-29

    Open →

Suitability

Context-specific fit derived from published classifications and the current ingredient evidence profile.

Fragrance avoidance

No fragrance-linked caution surfaced in the current profile.

Good fit

This ingredient does not currently read as a fragrance-linked driver in the published evidence and hazard profile.

Where it has been recorded

How often EPA CPDat has listed 2-Propenoic acid, 2-methyl-, methyl ester, polymer with butyl 2-propenoate, ethenylbenzene and 2-propenoic acid in a product composition. These are source records, not Greenveil catalog products.

Named organisations

1

Typical roles

Film formingOpacifyingViscosity controlling
See products using 2-Propenoic acid, 2-methyl-, methyl ester, polymer with butyl 2-propenoate, ethenylbenzene and 2-propenoic acid →

Catalog

Found in these products

Cosmetic and personal-care products that list 2-Propenoic acid, 2-methyl-, methyl ester, polymer with butyl 2-propenoate, ethenylbenzene and 2-propenoic acid are shown first. Their ingredient lists include 2-Propenoic acid, 2-methyl-, methyl ester, polymer with butyl 2-propenoate, ethenylbenzene and 2-propenoic acid; each product's own rating depends on its whole formula, so it is shown on the product page, not here.

See all 563 →Find products without it →