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CAS 79-78-7 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.

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InventoryRef 4133302/03/2011

ALLYL ALPHA-IONONE

1-(2,6,6-Trimethyl-2-cyclohexenyl)hepta-1,6-dien-3-one; cetone V; hexalon

ALLYL ALPHA-IONONE 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 79-78-7

CAS 79-78-7PubChem CID 5365976

Allyl-alpha-ionone

1-(2,6,6-Trimethyl-2-cyclohexen-1-yl)-1,6-heptadien-3-one is a sesquiterpenoid. — ChEBI

IUPAC name: (1E)-1-(2,6,6-trimethylcyclohex-2-en-1-yl)hepta-1,6-dien-3-one

Molecular formula: C16H24O
Molecular weight: 232.36 g/mol
Exact mass: 232.182715385 Da
XLogP3: 4.0
Topological polar surface area: 17.1 Å²
Hydrogen-bond donors: 0
Hydrogen-bond acceptors: 1
Covalent units: 1
Defined stereocentres: 0

Also known as

Allyl alpha-iononeIonone, allyl alpha-FEMA No. 20338IP66F9ODG1,6-HEPTADIEN-3-ONE, 1-(2,6,6-TRIMETHYL-2-CYCLOHEXEN-1-YL)-RefChem:554848201-225-9ALLYLIONONE

16 more reported names

Cetone VAllyl ionone1-(2,6,6-Trimethyl-2-cyclohexen-1-yl)-1,6-heptadien-3-one1-(2,6,6-Trimethyl-2-cyclohexen-1-yl)hepta-1,6-dien-3-onetropical ionone(E)-1-(2,6,6-trimethylcyclohex-2-en-1-yl)hepta-1,6-dien-3-oneAllyl cyclocitrylideneacetoneEINECS 201-225-9UNII-8IP66F9ODGBRN 3133731Butenyl alpha-cyclocitrylidenemethyl ketoneAllyl-a-iononeCyclocitrylidenemethyl butenyl ketone, alpha-Allyl ionone 3ALLYL .ALPHA.-IONONE4-07-00-00833 (Beilstein Handbook Reference)

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

ChEBI:CHEBI:168531
ChEMBL:CHEMBL3184724

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 ALLYL ALPHA-IONONE

INCI name

ALLYL ALPHA-IONONE

Description

1-(2,6,6-Trimethyl-2-cyclohexenyl)hepta-1,6-dien-3-one; cetone V; hexalon

Record provenance

Inventory reference: 41333
Imported identity: ALLYL ALPHA-IONONE
Source update: 02/03/2011

European Commission CosIng source notes

Annex records for ALLYL ALPHA-IONONE

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Key data

CAS

79-78-7

201-225-9

Restriction

—

Function

PERFUMING: Used for perfume and aromatic raw materials.

Official EU ingredient-name evidence

The ingredient name exactly matches the official 2025 EU glossary of common ingredient names.

#1390 · ALLYL ALPHA-IONONE

Ingredients with overlapping formulation functions

ALLO-OCIMENEPERFUMING

ALLO-OCIMENOLPERFUMING

ALLYL 2-METHYLBUTOXYACETATEPERFUMING

ALLYL 3,5,5-TRIMETHYLHEXANOATEPERFUMING

ALLYL BUTYRATEPERFUMING

ALLYL CAPROATEASTRINGENT, FRAGRANCE, PERFUMING, SKIN CONDITIONING - EMOLLIENT

ALLYL CINNAMATEPERFUMING

ALLYL CYCLOHEXYLACETATEPERFUMING

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 ALLYL ALPHA-IONONE appears in the CosIng inventory

The CosIng inventory lists ALLYL ALPHA-IONONE 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.

ALLYL ALPHA-IONONE 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

ALLYL ALPHA-IONONE 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, ALLYL ALPHA-IONONE carries the following function designation(s):

PERFUMING

CAS 79-78-7 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 ALLYL ALPHA-IONONE

This page reproduces the CosIng inventory entry for ALLYL ALPHA-IONONE 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 ALLYL ALPHA-IONONE 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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