What other records share CAS 31499-72-6?

CAS 31499-72-6 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 DIHYDRO-ALPHA-IONONE?

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 4143202/03/2011

DIHYDRO-ALPHA-IONONE

4-(2,6,6-Trimethyl-2-cyclohexenyl)butan-2-one

DIHYDRO-ALPHA-IONONE is listed in the EU CosIng inventory, but no direct annex records are linked on this page yet.

INCI Checker Compare all markets Search similar

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.

Markets and their official sources Search every market for this name

Chemical identity and properties

PubChem 2D chemical structure for CAS 31499-72-6

CAS 31499-72-6PubChem CID 35821

Dihydro-alpha-ionone

7,8-Dihydro-alpha-ionone is a sesquiterpenoid. — ChEBI

IUPAC name: 4-(2,6,6-trimethylcyclohex-2-en-1-yl)butan-2-one

Molecular formula: C13H22O
Molecular weight: 194.31 g/mol
Exact mass: 194.167065321 Da
XLogP3: 2.8
Topological polar surface area: 17.1 Å²
Hydrogen-bond donors: 0
Hydrogen-bond acceptors: 1
Covalent units: 1
Defined stereocentres: 0

Also known as

FEMA No. 3628EINECS 250-657-44-(2,6,6-Trimethyl-2-cyclohexen-1-yl)-2-butanoneDihydro-.alpha.-ionone2-BUTANONE, 4-(2,6,6-TRIMETHYL-2-CYCLOHEXEN-1-YL)-alpha-Dihydroionone.alpha.-7,8-DihydroiononeUNII-20P9Z50AR5

16 more reported names

.alpha.-Dihydroionone4-(2,2,6-Trimethyl-5-cyclohexen-1-yl)-2-butanone4-(2,6,6-Trimethyl-2-cyclohexen-1-yl)butan-2-oneAI3-3248120P9Z50AR54-(2,6,6-Trimethyl-2-cyclohexen-1-yl-2-butanone2',2''-Dihydro-.alpha.-iononeDIHYDRO-.ALPHA.-IONONE [FHFI]RefChem:1337072',2''-Dihydro-alpha-iononeALPHA-7,8-DIHYDROIONONE(+-)-DIHYDRO-ALPHA-IONONE(+-)-DIHYDRO-.ALPHA.-IONONEDIHYDRO-ALPHA-IONONE, (+-)-DIHYDRO-.ALPHA.-IONONE, (+-)-4-((1R)-2,6,6-trimethylcyclohex-2-en-1-yl)butan-2-one

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

ChEBI:CHEBI:191058
ChEMBL:CHEMBL4460864
EPA DTXSID:DTXSID40865599
PubMed:18666542

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 DIHYDRO-ALPHA-IONONE

INCI name

DIHYDRO-ALPHA-IONONE

Description

4-(2,6,6-Trimethyl-2-cyclohexenyl)butan-2-one

Record provenance

Inventory reference: 41432
Imported identity: DIHYDRO-ALPHA-IONONE
Source update: 02/03/2011

European Commission CosIng source notes

Annex records for DIHYDRO-ALPHA-IONONE

Browse

Browse EU annexes

Explore Annex II–VI to see which substances are prohibited, restricted or permitted under specific conditions.

Search annex entries

Search the annex database for entries matching DIHYDRO-ALPHA-IONONE or related substances.

Key data

CAS

31499-72-6

250-657-4

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.

#8660 · DIHYDRO-ALPHA-IONONE

Ingredients with overlapping formulation functions

DIHEXYL FUMARATEPERFUMING

DIHYDRO PENTAMETHYLINDANONEFRAGRANCE, PERFUMING

DIHYDRO-4-METHYL-5-METHYLBUTYL-FURANONEPERFUMING

DIHYDRO-4-METHYL-5-PENTYLFURANONEPERFUMING

DIHYDRO-ALPHA-METHYL ALPHA-IONONEPERFUMING

DIHYDRO-ALPHA-TERPINOLPERFUMING

DIHYDROANETHOLEPERFUMING

DIHYDROCARVEOLPERFUMING

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 DIHYDRO-ALPHA-IONONE appears in the CosIng inventory

The CosIng inventory lists DIHYDRO-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.

DIHYDRO-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

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

PERFUMING

CAS 31499-72-6 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.

View CAS records

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

Open INCI Checker

Source note for DIHYDRO-ALPHA-IONONE

This page reproduces the CosIng inventory entry for DIHYDRO-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 DIHYDRO-ALPHA-IONONE and compare linked records, but verify restrictions and legal status against the current official source text and law before making regulatory decisions.

View sources View updates

Tools & next steps

Check your formula

Scan a full INCI list to detect DIHYDRO-ALPHA-IONONE and any linked EU annex restrictions or allergen flags.

INCI Checker

Search similar ingredients

Find other inventory ingredients and annex entries related to DIHYDRO-ALPHA-IONONE, its identifiers or nearby name variants.