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trans-2-Hexenal diethyl acetal, when used as a fragrance ingredient

CAS 67746-30-9 · 100/100 · High conf.

trans-2-Hexenal diethyl acetal, when used as a fragrance ingredient chemical structure

Concern score

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

trans-2-Hexenal diethyl acetal, when used as a fragrance ingredient in plain language

What it is

Also known as (E)-2-HEXENAL diethyl acetal · 2-HEXENAL diethyl acetal, (2E)- · 2-Hexene, 1,1-diethoxy-, (2E)- · (2E)-1,1-Diethoxyhex-2-ene · (E)-1,1-diethoxyhex-2-ene · Leafaldehyde diethyl acetal

Show all 15 names

(E)-1,1-DIETHOXY-2-HEXENE · 1,1-DIETHOXYHEX-2-ENE · 1,1-Diethoxy-2-hexene · 1,1-Diethoxy-trans-2-hexene · 2-Hexene, 1,1-diethoxy- · 2-Hexene, 1,1-diethoxy-, (E)- · trans-2-Hexen-1-al diethyl acetal · trans-2-Hexenal diethyl acetal · trans-2-Hexenal diethylacetal

What it does

Used in consumer products as a fragrance ingredient and a flavouring.

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

Why it's flagged

trans-2-Hexenal diethyl acetal, 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 438.
    • Cosmetics Regulation annex II / ref 438.Source →
  • USEPAcommercial use observedEPA CPDat observed this chemical in 0 composition records across product categories including unclassified products. EPA CPDat classifies this chemical for functional uses including Fragrance, Flavouring and nutrient.
    • EPA CPDat observed this chemical in 0 composition records across product categories including unclassified products. EPA CPDat classifies this chemical for functional uses including Fragrance, 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

No expert opinion on file for trans-2-Hexenal diethyl acetal, 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 trans-2-Hexenal diethyl acetal, 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 February 8, 2019

    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 trans-2-Hexenal diethyl acetal, when used as a fragrance ingredient in a product composition. These are source records, not Greenveil catalog products.

Named organisations

3

Typical roles

FragranceFlavouring
See products using trans-2-Hexenal diethyl acetal, when used as a fragrance ingredient →