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GREENVEIL

  • industrial

(E,Z)-2,4-Nonadienal

CAS 21661-99-4

(E,Z)-2,4-Nonadienal chemical structure

Concern score

Not assessed — no hazard data yet.

(E,Z)-2,4-Nonadienal in plain language

What it is

Also known as 2,4-NONADIENAL, (2E,4Z)- · (2E,4Z)-nona-2,4-dienal · TRANS-2,CIS-4-NONADIENAL · (2E,4Z)-2,4-Nonadienal · (E,Z)-NONA-2,4-DIENA · (E,Z)-Nona-2,4-dienal

Show all 11 names

2,4-NONADIENAL, (e,z)- · Q27247564 · UNII-03H9U4J4V9 · Zhhyxnzjdgdgpj-igtjqsiksa-n · trans,cis-2,4-Nonadienal

What it does

Used in consumer products as a fragrance ingredient.

  • Fragrance
Is it a concern?
We haven't assessed a concern score for this ingredient yet.

Regulation

No restrictions found. (E,Z)-2,4-Nonadienal appears in these published regulatory listings.

Recorded in these product areas

  • Found in consumer products
  • Industrial
  • 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.
    • 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.Source →
  • USFDAlisted in openFDA substanceopenFDA substance registry classifies this ingredient as chemical.
    • openFDA substance registry classifies this ingredient as chemical.Source →

Evidence & sources

No graded research studies for (E,Z)-2,4-Nonadienal yet. This record is compiled from the published data sources below — registries and regulatory listings, not study findings.

5 data sources

Where this comes from

  • EPA Chemical and Products Database

    exposure · updated 2019-11-18

    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 (E,Z)-2,4-Nonadienal in a product composition. These are source records, not Greenveil catalog products.

Named organisations

2

Typical roles

Fragrance
See products using (E,Z)-2,4-Nonadienal →