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4-(4-Methoxyphenyl)-3-butene-2-one (Anisylidene acetone), when used as a fragrance ingredient

CAS 943-88-4 · 100/100 · High conf.

Also registered as 1 other CAS number

3815-30-3

4-(4-Methoxyphenyl)-3-butene-2-one (Anisylidene acetone), when used as a fragrance ingredient chemical structure

Concern score

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

4-(4-Methoxyphenyl)-3-butene-2-one (Anisylidene acetone), when used as a fragrance ingredient in plain language

What it is

Also known as 3-Buten-2-one, 4-(4-methoxyphenyl)- · P-methoxybenzylideneacetone · (E)-4-(4-methoxyphenyl)but-3-en-2-one · 1-(P-METHOXYPHENYL)-1-BUTEN-3-ONE · 4'-METHOXYBENZYLIDENEACETONE · 4-(4-Methoxyphenyl)but-3-en-2-one

Show all 23 names

4-(P-METHOXYPHENYL)-3-BUTEN-2-ONE · 4-(P-METHOXYPHENYL)-3-BUTENE-2-ONE · METHOXYPHENYL)-3-BUTEN-2-ONE, 4-(P- · Methyl p-methoxystyryl ketone · P-anisalacetone · P-methoxybenzalacetone · P-methoxystyryl methyl ketone · 3-BUTEN-2-ONE, 4-(P-METHOXYPHENYL)- · 4-(4-METHOXYPHENYL)-3-BUTEN-2-ONE · 4-METHOXYBENZYLIDENEACETONE · 4-METHOXYSTYRYL methyl ketone · 4-Methoxybenzalacetone · Anisalacetone · Anisylidene acetone · Methyl-p-methoxycinnamylketone · p-Anisilidenacetone · trans-4-Methoxybenzalacetone

What it does

We don't have a plain-language description for 4-(4-Methoxyphenyl)-3-butene-2-one (Anisylidene acetone), when used as a fragrance ingredient yet.

Is it a concern?
Critical concern: no hazard classifications on record. It is banned in EU cosmetics.

Why it's flagged

4-(4-Methoxyphenyl)-3-butene-2-one (Anisylidene acetone), when used as a fragrance ingredient 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 →
  • EUCosIngActiveCosmetics Regulation annex II / ref 443.
    • Cosmetics Regulation annex II / ref 443.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 →
  • USFDAlisted in openFDA substanceopenFDA substance registry classifies this ingredient as chemical.
    • openFDA substance registry classifies this ingredient as chemical.Source →

Expert safety opinions

No expert opinion on file for 4-(4-Methoxyphenyl)-3-butene-2-one (Anisylidene acetone), when used as a fragrance ingredient. 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 4-(4-Methoxyphenyl)-3-butene-2-one (Anisylidene acetone), when used as a fragrance ingredient yet. This record is compiled from the published data sources below — registries and regulatory listings, not study findings.

7 data sources

Where this comes from

  • CosIng

    regulatory · updated 2026-09-23

    Open →

  • EU CosIng Cosmetics Regulation Annexes

    regulatory · updated 2010-10-20

    Open →

  • EPA Chemical and Products Database

    exposure · updated 2020-02-13

    Open →

  • EPA DSSTox Identifiers

    chemistry · updated 2025-12-29

    Open →

  • FDA GSRS UNII

    registry · updated 2026-02-26

    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.

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 4-(4-Methoxyphenyl)-3-butene-2-one (Anisylidene acetone), when used as a fragrance ingredient in a product composition. These are source records, not Greenveil catalog products.

Named organisations

1

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