beauty
cleaning
food
industrial

Styrene

CAS 12770-88-6 · 100/100 · High conf.

Also registered as 13 other CAS numbers

25086-18-4 · 29967-69-9 · 98444-30-5 · 79637-11-9 · 1161074-30-1 · 1198090-46-8 · 1453489-93-4 · 1646200-96-5 · 2015955-51-6 · 2351150-23-5 · 2576469-81-1 · 2706608-32-2 · 100-42-5

Concern score

100/100Critical concern driven by cmr.

High confidence

Styrene in plain language

What it is: Also known as Cinnamene · Ethenylbenzene · Maomin sm · Styrolene · Styropol so · Benzene, ethenyl-
Show all 26 names
Benzene, vinyl- · Cinnamenol · Cinnamol · Ethylene, phenyl- · Fenil etileno · Phenethylene · Phenylethene · Phenylethylene · Styren · Styrene Monomer · Styrol · Styrole · Ttb 7302 · Vinyl benzene · Vinylbenzen · Vinylbenzene · Vinylbenzol · estireno · styrene (sara iii) · styrene monomer (mfr cas# 101-42-5)
What it does: Used in cosmetics as a solvent.
Solvent
Contaminant
Thickener
Fragrance
Flavouring
Is it a concern?: Critical concern: classified for carcinogenic, mutagenic or reproductive toxicity (CMR). It is banned in EU cosmetics.

Why it's flagged

Styrene 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
Cleaning
Industrial

EUEC
Annex II of EU Cosmetics Regulation (EC) 1223/2009: substances prohibited in cosmetic products. CMR: Reprotoxic Cat. 2()
banned
View source →

EUCosIngActive2 entries
- Styrene is the organic compound that conforms to the formula: Restriction: II/1575Source →
- Cosmetics Regulation annex II / ref 1575.Source →
GLOBALJECFAEvaluatedJECFA evaluation record. Functional class: contaminant.
- JECFA evaluation record. Functional class: contaminant.Source →
USEPAcommercial use observedEPA CPDat observed this chemical in 1544 composition records across product categories including Furniture and furnishings, Construction and building materials, Vehicle. EPA CPDat classifies this chemical for functional uses including Fragrance, Viscosity modifier, Flavouring and nutrient.
- EPA CPDat observed this chemical in 1544 composition records across product categories including Furniture and furnishings, Construction and building materials, Vehicle. EPA CPDat classifies this chemical for functional uses including Fragrance, Viscosity modifier, Flavouring and nutrient.Source →
USFDAlisted in openFDA substanceopenFDA substance registry classifies this ingredient as chemical.
- openFDA substance registry classifies this ingredient as chemical.Source →

Expert safety opinions

Independent scientific assessments cited by the records we hold, with the year and link where the record gives one.

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.
JECFA
Joint FAO/WHO Expert Committee on Food Additives
- JECFA evaluation record. Functional class: contaminant.
  Year not recorded · GLOBAL JECFA listing · Read the source →

Evidence & sources

No graded research studies for Styrene yet. This record is compiled from the published data sources below — registries and regulatory listings, not study findings.

8 data sources

Where this comes from

CosIng
regulatory · updated 2026-09-23
Open →
EU CosIng Cosmetics Regulation Annexes
regulatory · updated 2020-07-30
Open →
EPA Chemical and Products Database
exposure · updated october 12, 2016
Open →
EPA DSSTox Identifiers
chemistry · updated 2025-12-29
Open →
FDA GSRS UNII
registry · updated 2026-02-26
Open →
WHO JECFA Database
regulatory · updated 2026-10-04
Open →
openFDA Substance
registry · updated 2026-05-24
Open →
PubChem Live Enrichment
chemistry · updated 2026-05-17
Open →

Suitability

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

Food use

Food-use source coverage is present in the current record.

Good fit

The ingredient appears in food-oriented source coverage or allowed-use references, which makes food use easier to support than a context with no domain signal at all.

Fragrance avoidance

Not a strong fit for fragrance avoidance because it carries Fragrance.

Avoid

The ingredient itself is a fragrance-linked signal, so it is better treated as an avoid case when fragrance exposure is the main concern.

Where it has been recorded

How often EPA CPDat has listed Styrene in a product composition. These are source records, not Greenveil catalog products.

Source records

1,544

Named organisations

Furniture and furnishingsConstruction and building materialsVehicleCleaning products and household careRaw materialsHome maintenance

Typical roles

SolventContaminantThickenerFragranceFlavouring

See products using Styrene →

Catalog

Found in these products

Their ingredient lists include Styrene; each product's own rating depends on its whole formula, so it is shown on the product page, not here.

See all 15 →Find products without it →

Co-occurrence

Often appears with

Ingredients that frequently appear alongside Styrene in the catalog.