Is NONAN-2-ONE safe to use in EU cosmetics?

NONAN-2-ONE is listed in the EU CosIng ingredient inventory with no direct annex restriction records linked at this time. Always verify against the current official CosIng database before formulating.

What other records share CAS 821-55-6?

CAS 821-55-6 may appear across multiple EU annex records. The CAS lookup page shows all Annex II–VI entries sharing this identifier, useful for identifying cross-annex regulatory status of the same chemical substance.

How do I check if my formula contains NONAN-2-ONE?

Use the INCI Checker to screen a full ingredient list across selected markets, or use the substance market comparison to review this identity across all supported market datasets.

InventoryRef 4091202/03/2011

NONAN-2-ONE

Nonan-2-one

NONAN-2-ONE is listed in the EU CosIng inventory, but no direct annex records are linked on this page yet.

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Regulatory evidence by market

No rule for this ingredient has been imported for any of the 13 markets tracked here.

That describes this inventory, not the law. No imported rule is not evidence that an ingredient is permitted: a rule may exist under another name or identifier, or in a dataset not yet imported here.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 821-55-6

CAS 821-55-6PubChem CID 13187

2-Nonanone

Nonan-2-one is a methyl ketone that is nonane in which the methylene hydrogens at position 2 are replaced by an oxo group. It has a role as a plant metabolite. It derives from a hydride of a nonane. — ChEBI

IUPAC name: nonan-2-one

Molecular formula: C9H18O
Molecular weight: 142.24 g/mol
Exact mass: 142.135765193 Da
XLogP3: 3.1
Topological polar surface area: 17.1 Å²
Hydrogen-bond donors: 0
Hydrogen-bond acceptors: 1
Covalent units: 1
Defined stereocentres: 0

Also known as

Heptyl methyl ketoneMethyl heptyl ketonebeta-NonanoneKetone, heptyl methylMETHYL N-HEPTYL KETONEFEMA No. 2785NSC 14760ZE5K73YN2Z

16 more reported names

NSC-14760CHEBI:77927RefChem:88764212-480-0.beta.-Nonanone2-Nonanone-d5n-C7H15COCH3Methyl heptyl ketone; Methyl n-heptyl ketone; NSC 147602-Nonanone (natural)NonanoneEINECS 212-480-0UNII-ZE5K73YN2ZBRN 1743645Heptylmethylketonemethylheptyl ketoneNONANONE-2

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

ChEBI:CHEBI:77927
ChEMBL:CHEMBL2228473
EPA DTXSID:DTXSID2022125
PubMed:22967641
PubMed:22917765
PubMed:22893020
PubMed:22716902
PubMed:22690147
PubMed:22606192
PubMed:22536331
PubMed:22489113
PubMed:22483725
PubMed:22454678
PubMed:22443185
PubMed:22438717

Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Inventory details for NONAN-2-ONE

INCI name

NONAN-2-ONE

Description

Nonan-2-one

Record provenance

Inventory reference: 40912
Imported identity: NONAN-2-ONE
Source update: 02/03/2011

European Commission CosIng source notes

Annex records for NONAN-2-ONE

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Key data

CAS

821-55-6

212-480-0

Restriction

—

Function

PERFUMING: Used for perfume and aromatic raw materials.

Ingredients with overlapping formulation functions

NONA-2,4-DIENALPERFUMING

NONANAL/METHYL ANTHRANILATE SCHIFF BASEPERFUMING

Additional official and scientific sources

11 external databases to check this identity in

Each link searches that source for this identity. What each source is, and its legal weight

ECHA CHEM / Information on chemicals PubChem PUG REST EU Safety Gate cosmetic product alerts ECHA CHEM US EPA CompTox Cosmetic Ingredient Review safety assessments FDA Global Substance Registration System ILO/WHO International Chemical Safety Cards Japan NITE-CHRIP NIOSH Pocket Guide to Chemical Hazards OECD eChemPortal

How NONAN-2-ONE appears in the CosIng inventory

The CosIng inventory lists NONAN-2-ONE as a cosmetic ingredient and this page links it to 0 annex records. The inventory entry captures names and identifiers, while the annex records show where the substance is prohibited, restricted or positively listed in EU cosmetics law.

NONAN-2-ONE is also tagged with 1 cosmetic function in the official data. Function labels describe intended use, but they do not replace regulatory review of linked annex records before formulation or labelling work.

Frequently asked questions

NONAN-2-ONE is listed in the EU CosIng ingredient inventory with no direct annex restriction records linked at this time. Absence of an annex link does not guarantee unrestricted use — always verify against the current official CosIng database before formulating.

According to the EU CosIng inventory, NONAN-2-ONE carries the following function designation(s):

PERFUMING

CAS 821-55-6 may appear across multiple EU annex records. Viewing the CAS lookup page shows all Annex II–VI entries sharing this identifier, which is useful for identifying cross-annex regulatory status of the same chemical substance.

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Source note for NONAN-2-ONE

This page reproduces the CosIng inventory entry for NONAN-2-ONE from public European Commission cosmetic ingredient materials and shows linked identifiers even when no direct annex match is currently attached.

Use this inventory page to research NONAN-2-ONE and compare linked records, but verify restrictions and legal status against the current official source text and law before making regulatory decisions.

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