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CAS 705-86-2 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 3949615/10/2010

DELTA-DECALACTONE

Decan-5-olide

DELTA-DECALACTONE 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 705-86-2

CAS 705-86-2PubChem CID 12810

delta-Decalactone

6-pentyloxan-2-one is a delta-lactone that is 5-valerolactone substituted by a pentyl group at position 6. It has a role as a metabolite. It is functionally related to a 5-valerolactone. — ChEBI

IUPAC name: 6-pentyloxan-2-one

Molecular formula: C10H18O2
Molecular weight: 170.25 g/mol
Exact mass: 170.130679813 Da
XLogP3: 2.5
Topological polar surface area: 26.3 Å²
Hydrogen-bond donors: 0
Hydrogen-bond acceptors: 2
Covalent units: 1
Defined stereocentres: 0

Also known as

6-Pentyltetrahydro-2H-pyran-2-one5-Decanolidedelta-Decanolactone2H-Pyran-2-one, tetrahydro-6-pentyl-5-DecalactoneDecan-5-olidedelta-Decalactone (natural)FEMA No. 2361

16 more reported names

Tetrahydro-6-pentyl-2H-pyran-2-onedelta-Pentyl-delta-valerolactone.delta.-Decalactone5-Amyl-5-hydroxypentanoic acid lactone.DELTA.-LACTONE-EINECS 211-889-1UNII-CNA0S5T234.delta.-Decanolide6-pentylvalerolactoneBRN 0117520CNA0S5T234Tetrahydro-6-pentylpyran-2-one.delta.-Decanolactone(RS)-.DELTA.-DECALACTONE.DELTA.-DECALACTONE [MI]DECALACTONE DELTA

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

ChEBI:CHEBI:87327
ChEMBL:CHEMBL3182189
EPA DTXSID:DTXSID0044496
PubMed:21535590
PubMed:20827703
PubMed:20415420
PubMed:19630425
PubMed:18598047
PubMed:18576988
PubMed:18495140
PubMed:18473468
PubMed:18393434
PubMed:17935296
PubMed:17846564
PubMed:17705437

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 DELTA-DECALACTONE

INCI name

DELTA-DECALACTONE

Description

Decan-5-olide

Record provenance

Inventory reference: 39496
Imported identity: DELTA-DECALACTONE
Source update: 15/10/2010

European Commission CosIng source notes

Annex records for DELTA-DECALACTONE

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Key data

CAS

705-86-2

211-889-1

Restriction

—

Function

FRAGRANCE: Imparting an odour or taste. Creating a perceivable pleasant smell and/or masking a bad smell.
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.

#8308 · DELTA-DECALACTONE

Ingredients with overlapping formulation functions

DECENOLFRAGRANCE, PERFUMING

DECENONEFRAGRANCE; FLAVOURING

DECYL ALCOHOLFRAGRANCE, SKIN CONDITIONING - EMOLLIENT, SURFACTANT - CLEANSING, SURFACTANT - FOAM BOOSTING, VISCO…

DELTA-DAMASCONEFRAGRANCE, PERFUMING

DELTA-METHRINFRAGRANCE; SKIN CONDITIONING

DENATONIUM BENZOATEDENATURANT, FRAGRANCE

DIACETONE ALCOHOLFRAGRANCE, SOLVENT

DIANTHUS CARYOPHYLLUS FLOWER EXTRACTFRAGRANCE, PERFUMING, SKIN CONDITIONING

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 DELTA-DECALACTONE appears in the CosIng inventory

The CosIng inventory lists DELTA-DECALACTONE 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.

DELTA-DECALACTONE is also tagged with 2 cosmetic functions 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

DELTA-DECALACTONE 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, DELTA-DECALACTONE carries the following function designation(s):

CAS 705-86-2 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 DELTA-DECALACTONE

This page reproduces the CosIng inventory entry for DELTA-DECALACTONE 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 DELTA-DECALACTONE 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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