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[(1R)-2,2,3-Trimethylcyclopent-3-en-1-yl]acetaldehyde

CAS 42370-35-4

Also registered as 1 other CAS number

4501-58-0

[(1R)-2,2,3-Trimethylcyclopent-3-en-1-yl]acetaldehyde chemical structure

Concern score

Not assessed — no hazard data yet.

[(1R)-2,2,3-Trimethylcyclopent-3-en-1-yl]acetaldehyde in plain language

What it is

On cosmetic ingredient lists it appears as “D-TRIMETHYL-3-CYCLOPENTENE-1-ACETALDEHYDE”.

Also known as D-TRIMETHYL-3-CYCLOPENTENE-1-ACETALDEHYDE · 2,2,3-TRIMETHYLCYCLOPENT-3-EN-1-YL acetaldehyde · Campholenic aldehyde, (+)- · alpha-Campholenal · (+)-(r)-.alpha.-campholenic aldehyde · (+)-(r)-campholenaldehyde

Show all 26 names

(+)-.alpha.-campholenaldehyde · (+)-.alpha.-campholenic aldehyde · (+)-campholenal · (+)-campholenaldehyde · (r)-(+)-campholenic aldehyde · (r)-.alpha.-campholenic aldehyde · α-Campholenal · ((1R)-2,2,3-TRIMETHYLCYCLOPENT-3-EN-1-YL)ACETALDEHYDE · (R)-2,2,3-Trimethylcyclopent-3-ene-1-acetaldehyde · .alpha.-campholenal · 2,2,3-Trimethyl-3-Cyclopentene-1-acetaldehyde · 2,2,3-Trimethyl-3-cyclopentacetaldehyde · 2,2,3-Trimethyl-3-cyclopentene-1-acetaldehyde, (R)- · 3-Cyclopentene-1-acetaldehyde, 2,2,3-trimethyl-, (1R)- · 3-Cyclopentene-1-acetaldehyde, 2,2,3-trimethyl-, (R)- · Campholenal, alpha- · Campholenaldehyde, alpha- · Campholenic aldehyde · Ec 224-815-8 · alpha-Campholenaldehyde

What it does

Used in cosmetics as a fragrance ingredient.

  • Perfuming
  • Fragrance
  • Flavouring
Is it a concern?
We haven't assessed a concern score for this ingredient yet. It is listed for cosmetic use in the EU.

Regulation

No restrictions found. [(1R)-2,2,3-Trimethylcyclopent-3-en-1-yl]acetaldehyde appears in these published regulatory listings.

Recorded in these product areas

  • Found in consumer products
  • Industrial
  • EUCosIngActiveListed in CosIng inventory for cosmetic use.
    • Listed in CosIng inventory for cosmetic use.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 [(1R)-2,2,3-Trimethylcyclopent-3-en-1-yl]acetaldehyde. 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 [(1R)-2,2,3-Trimethylcyclopent-3-en-1-yl]acetaldehyde yet. This record is compiled from the published data sources below — registries and regulatory listings, not study findings.

6 data sources

Where this comes from

  • CosIng

    regulatory · updated 2026-09-23

    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 [(1R)-2,2,3-Trimethylcyclopent-3-en-1-yl]acetaldehyde in a product composition. These are source records, not Greenveil catalog products.

Named organisations

3

Typical roles

PerfumingFragranceFlavouring
See products using [(1R)-2,2,3-Trimethylcyclopent-3-en-1-yl]acetaldehyde →