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CAS 36431-72-8 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 4107002/03/2011

TETRAMETHYL-1-OXASPIRO-6-DECENE

2,6,10,10-Tetramethyl-1-oxaspiro(4.5)dec-6-ene

TETRAMETHYL-1-OXASPIRO-6-DECENE 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 36431-72-8

CAS 36431-72-8PubChem CID 61953

Theaspirane

Theaspirane is a norisoprenoid with forumula C13H22O that is a flavour component found in various essential oils such as raspberry oil and passion fruit oil. It has a role as a volatile oil component, a flavouring agent and a fragrance. It is a volatile organic compound, a norisoprenoid, an oxaspiro compound and an olefinic compound. — ChEBI

IUPAC name: 2,6,6,10-tetramethyl-1-oxaspiro[4.5]dec-9-ene

Molecular formula: C13H22O
Molecular weight: 194.31 g/mol
Exact mass: 194.167065321 Da
XLogP3: 3.0
Topological polar surface area: 9.2 Å²
Hydrogen-bond donors: 0
Hydrogen-bond acceptors: 1
Covalent units: 1
Defined stereocentres: 0

Also known as

2,6,10,10-Tetramethyl-1-oxaspiro[4.5]dec-6-ene1-Oxaspiro[4.5]dec-6-ene, 2,6,10,10-tetramethyl-FEMA No. 37741-Oxaspiro-2,6,10,10-tetramethyl(4.5)dec-6-ene2,6,10,10-Tetramethyl-1-oxaspiro(4.5)dec-6-ene7371A7GT6ECHEBI:895981-Oxaspiro(4.5)dec-6-ene, 2,6,10,10-tetramethyl-

16 more reported names

2,6,6,10-tetramethyl-1-oxaspiro(4.5)dec-9-eneRefChem:897606253-031-9Theaspirane ATheaspirane B(+/-)-Theaspiranetheaspirane Is Icis-Theaspiranetheaspirane, Itheaspirane, IItheaspirane Is II6,9-Epoxy-4-megastigmeneFEMA 3774UNII-7371A7GT6EEINECS 253-031-9Theaspirane (Isomer 1)

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

ChEBI:CHEBI:89598
ChEMBL:CHEMBL3185445
PubMed:22117650
PubMed:19754174
PubMed:16190639
PubMed:15453689

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 TETRAMETHYL-1-OXASPIRO-6-DECENE

INCI name

TETRAMETHYL-1-OXASPIRO-6-DECENE

Description

2,6,10,10-Tetramethyl-1-oxaspiro(4.5)dec-6-ene

Record provenance

Inventory reference: 41070
Imported identity: TETRAMETHYL-1-OXASPIRO-6-DECENE
Source update: 02/03/2011

European Commission CosIng source notes

Annex records for TETRAMETHYL-1-OXASPIRO-6-DECENE

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Key data

CAS

36431-72-8

253-031-9

Restriction

—

Function

PERFUMING: Used for perfume and aromatic raw materials.

Ingredients with overlapping formulation functions

TETRAHYDRONAPHTHALENE-2-ETHANOLPERFUMING

TETRAHYDRONAPHTHALENOLPERFUMING

TETRAMETHYL ACETYLOCTAHYDRONAPHTHALENESFRAGRANCE, PERFUMING, SKIN CONDITIONING

TETRAMETHYL-1-HEXADECEN-3-OLPERFUMING

TETRAMETHYL-3-CYCLOHEXENE-1-METHYL FORMATEPERFUMING

TETRAMETHYL-3-CYCLOPENTENEBUTANOLPERFUMING

TETRAMETHYL-4,8-DECADIENENITRILEPERFUMING

TETRAMETHYL-4-METHYLENE-2-HEPTANOLPERFUMING

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 TETRAMETHYL-1-OXASPIRO-6-DECENE appears in the CosIng inventory

The CosIng inventory lists TETRAMETHYL-1-OXASPIRO-6-DECENE 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.

TETRAMETHYL-1-OXASPIRO-6-DECENE 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

TETRAMETHYL-1-OXASPIRO-6-DECENE 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, TETRAMETHYL-1-OXASPIRO-6-DECENE carries the following function designation(s):

PERFUMING

CAS 36431-72-8 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 TETRAMETHYL-1-OXASPIRO-6-DECENE

This page reproduces the CosIng inventory entry for TETRAMETHYL-1-OXASPIRO-6-DECENE 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 TETRAMETHYL-1-OXASPIRO-6-DECENE 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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