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CAS 591-12-8 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 4067902/03/2011

5-METHYLFURANONE

5-Methylfuran-2(3H)-one

5-METHYLFURANONE 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 591-12-8

CAS 591-12-8PubChem CID 11559

alpha-Angelica lactone

Alpha-angelica lactone is an angelica lactone and a butenolide. It is functionally related to a but-3-en-4-olide. It is a tautomer of a beta-angelica lactone. — ChEBI

IUPAC name: 5-methyl-3H-furan-2-one

Molecular formula: C5H6O2
Molecular weight: 98.10 g/mol
Exact mass: 98.036779430 Da
XLogP3: 0.6
Topological polar surface area: 26.3 Å²
Hydrogen-bond donors: 0
Hydrogen-bond acceptors: 2
Covalent units: 1
Defined stereocentres: 0

Also known as

5-Methylfuran-2(3H)-onealpha-Angelicalactone5-Methyl-2(3H)-furanone2(3H)-FURANONE, 5-METHYL-4-Hydroxypent-3-enoic acid lactone4-Hydroxy-3-pentenoic acid gamma-lactonedelta(2)-Angelica lactone.alpha.-Angelica lactone

16 more reported names

gamma-Methyl-beta,gamma-crotonolactonea-Angelica lactonealpha-AngelicalactonUNII-29CRF6L9C5delta(sup 2)-Angelica lactoneCCRIS 3594.beta.,.gamma.-Angelica lactonea-angelicalactonebeta,gamma-Angelica lactoneEINECS 209-701-84-Methyl-2(3H)-furanone.delta.(2)-Angelica lactoneBRN 010839429CRF6L9C5AI3-04326NSC-654

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

ChEBI:CHEBI:36433
ChEMBL:CHEMBL478640
EPA DTXSID:DTXSID7047693
PubMed:17718460
PubMed:12869420
PubMed:12791507
PubMed:11309284

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 5-METHYLFURANONE

INCI name

5-METHYLFURANONE

Description

5-Methylfuran-2(3H)-one

Record provenance

Inventory reference: 40679
Imported identity: 5-METHYLFURANONE
Source update: 02/03/2011

European Commission CosIng source notes

Annex records for 5-METHYLFURANONE

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Key data

CAS

591-12-8

209-701-8

Restriction

—

Function

PERFUMING: Used for perfume and aromatic raw materials.

Ingredients with overlapping formulation functions

5-METHYL-2-PHENYL-2-HEXENALPERFUMING

5-METHYL-5-PHENYL-3-HEXANONEPERFUMING

5-METHYL-ALPHA-IONONEPERFUMING

5-METHYL-BETA-IONONEPERFUMING

5-NONEN-2-ONEPERFUMING

5-PHENYLHEX-3-EN-2-ONEPERFUMING

5-PHENYLHEX-4-EN-2-ONEPERFUMING

6,10-DIMETHYLUNDECA-1,5,9-TRIEN-4-OLPERFUMING

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 5-METHYLFURANONE appears in the CosIng inventory

The CosIng inventory lists 5-METHYLFURANONE 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.

5-METHYLFURANONE 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

5-METHYLFURANONE 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, 5-METHYLFURANONE carries the following function designation(s):

PERFUMING

CAS 591-12-8 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 5-METHYLFURANONE

This page reproduces the CosIng inventory entry for 5-METHYLFURANONE 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 5-METHYLFURANONE 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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