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  • beauty
  • cleaning

(2E)-2-(Phenylmethylidene)octanal

CAS 165184-98-5

Also registered as 1 other CAS number

101-86-0

(2E)-2-(Phenylmethylidene)octanal chemical structure

Concern score

Not assessed — no hazard data yet.

(2E)-2-(Phenylmethylidene)octanal in plain language

What it is

Also known as .alpha.-hexylcinnamaldehyde, (2E)- · alpha-Hexylcinnamaldehyde · (2E)-2-Benzylideneoctanal · (E)-2-benzylideneoctanal · (E)-2-hexyl cinnamaldehyde · 2-(Phenylmethylene)octanal

Show all 19 names

2-Benzylideneoctanal · 2-Hexyl-(E)-cinnamaldehyde · CINNAMALDEHYDE, alpha-HEXYL- · Hexylcinnamal · Hexylcinnamaldehyde · Octanal, 2-(PHENYLMETHYLENE)-, (e)- · Octanal, 2-(phenylmethylene)- · Octanal, 2-(phenylmethylene)-, (2E)- · alpha-Hexyl-beta-phenylacrolein · alpha-Hexylcinnamic aldehyde · alpha-Hexylcinnamyl aldehyde · alpha-n-Hexyl-beta-phenylacrolein · hexyl cinnamaldehyde

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. (2E)-2-(Phenylmethylidene)octanal appears in these published regulatory listings.

Recorded in these product areas

  • Found in consumer products
  • Beauty
  • Cleaning
  • USEPAcommercial use observedEPA CPDat observed this chemical in 14 composition records across product categories including Personal care, Cleaning products and household care. EPA CPDat classifies this chemical for functional uses including Fragrance.
    • EPA CPDat observed this chemical in 14 composition records across product categories including Personal care, Cleaning products and household care. 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 →

Expert safety opinions

No expert opinion on file for (2E)-2-(Phenylmethylidene)octanal. 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 (2E)-2-(Phenylmethylidene)octanal 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 September 2013

    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 (2E)-2-(Phenylmethylidene)octanal in a product composition. These are source records, not Greenveil catalog products.

Source records

14

Named organisations

6

Personal careCleaning products and household care

Typical roles

Fragrance
See products using (2E)-2-(Phenylmethylidene)octanal →

Catalog

Found in these products

Their ingredient lists include (2E)-2-(Phenylmethylidene)octanal; each product's own rating depends on its whole formula, so it is shown on the product page, not here.

See all 13 →Find products without it →