What does 9-Decen-2-one do?

Used in cosmetics as a flavouring and a fragrance ingredient.

Is 9-Decen-2-one safe?

We haven't assessed a concern score for this ingredient yet. It is listed for cosmetic use in the EU.

beauty
industrial

9-Decen-2-one

CAS 35194-30-0

Concern score

Not assessed — no hazard data yet.

9-Decen-2-one in plain language

What it is: On cosmetic ingredient lists it appears as “Decenone”.
Also known as Decenone · Dec-9-en-2-one · 9-decen-2-one, >=95% · 9-oxodecen · AKOS006324329 · Dzeclzdtsqjbsu-uhfffaoysa-n
Show all 11 names
H40027 · KBA19430 · Methyl OCT-7-ENYL ketone · T29489 · UNII-729DA2V237
What it does: Used in cosmetics as a flavouring and a fragrance ingredient.
Flavouring
Fragrance
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. 9-Decen-2-one appears in these published regulatory listings.

Recorded in these product areas

Found in consumer products
Industrial

EUCosIngActiveDecenone is the organic compound that conforms to the formula:
- Decenone is the organic compound that conforms to the formula: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 9-Decen-2-one. 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 9-Decen-2-one 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 9-Decen-2-one in a product composition. These are source records, not Greenveil catalog products.

Named organisations

Typical roles

FlavouringFragrance

See products using 9-Decen-2-one →