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CAS 1135-66-6 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.

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InventoryRef 4017002/03/2011

HEXAHYDRO-TETRAMETHYL-METHANONAPHTHALENE

(2S)-1,3,4,5,6,7-Hexahydro-1,1,5,5-tetramethyl-2H-2,4a-methanonaphthalene

HEXAHYDRO-TETRAMETHYL-METHANONAPHTHALENE 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 1135-66-6

CAS 1135-66-6PubChem CID 11127402

Isolongifolene

isolongifolene has been reported in Alpinia latilabris, Daucus carota, and other organisms with data available. — LOTUS - the natural products occurrence database

IUPAC name: (1R,8S)-2,2,7,7-tetramethyltricyclo[6.2.1.01,6]undec-5-ene

Molecular formula: C15H24
Molecular weight: 204.35 g/mol
Exact mass: 204.187800766 Da
XLogP3: 5.0
Topological polar surface area: 0.0 Å²
Hydrogen-bond donors: 0
Hydrogen-bond acceptors: 0
Covalent units: 1
Defined stereocentres: 2

Also known as

(-)-Isolongifoleneiso-LongifoleneIsolongifolene, (-)-E0LN4V7EY4EINECS 214-494-2(2S)-1,3,4,5,6,7-Hexahydro-1,1,5,5-tetramethyl-2H-2,4a-methanonaphthalene2H-2,4a-Methanonaphthalene, 1,3,4,5,6,7-hexahydro-1,1,5,5-tetramethyl-, (2S,4aR)-2H-2,4a-Methanonaphthalene, 1,3,4,5,6,7-hexahydro-1,1,5,5-tetramethyl-, (2S,4aR)-(-)-

16 more reported names

RefChem:791890(+/-)-IsolongifoleneIsolongifolene, (+/-)-PX6N25M90HUNII-PX6N25M90H2H-2,4a-Methanonaphthalene, 1,3,4,5,6,7-hexahydro-1,1,5,5-tetramethyl-(2S,4aR)-1,1,5,5-Tetramethyl-1,3,4,5,6,7-hexahydro-2H-2,4a-methanonaphthalene2H-2,4a-Methanonaphthalene, 1,3,4,5,6,7-hexahydro-1,1,5,5-tetramethyl-, (+/-)-2H-2alpha,4aalpha-Methanonaphthalene, 1,3,4,5,6,7-hexahydro-1,1,5,5-tetramethyl-, (+/-)-UNII-E0LN4V7EY4CQUAYTJDLQBXCQ-NHYWBVRUSA-NHY-N7363Tox21_302253EBC-615364(2S,4aR)-1,2,3,4,4a,5,6,7-Octahydro-1,1,5,5-tetramethyl-2,4a-methanonaphthalene2H-2,4a-Methanonaphthalene,1,3,4,5,6,7-hexahydro-1,1,5,5-tetramethyl-, (2S,4aR)-

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

ChEMBL:CHEMBL3183415
EPA DTXSID:DTXSID1044518

Evidence from additional scientific databases

NIH PubChem PUG-View

Exact identifier match11127402

Attributed physical-property, hazard, environmental and use annotations.

Physical Description: CBI Source: EPA Chemical Data Reporting (CDR)

Signal: Danger Source: European Chemicals Agency (ECHA)
GHS Hazard Statements: H304 (95.2%): May be fatal if swallowed and enters airways [Danger Aspiration hazard] Source: European Chemicals Agency (ECHA)
Precautionary Statement Codes: P301+P316, P331, P405, and P501 (click each P-code to see the statement) Source: European Chemicals Agency (ECHA)
ECHA C&L Notifications Summary: Aggregated GHS information provided per 1601 reports by companies from 7 notifications to the ECHA C&L Inventory.; Information may vary between notifications depending on impurities, additives, and other factors. The percentage value in parenthesis indicates the notified classification ratio from companies that provide hazard codes. Only hazard codes with percentage values above 10% are shown. For more detailed information, please visit ECHA C&L website. Source: European Chemicals Agency (ECHA)

Consumer Uses: Fragrance Source: EPA Chemical Data Reporting (CDR)

Mapped by: Existing checksum-valid CAS to unique PubChem CID match. Retrieved: 2026-08-31. Open source record

Scientific classifications and hazard annotations provide context and do not replace the market-specific regulatory decision shown above.

Additional source coverage and match status

Source	Result	Checked
NIH PubChem PUG-View	Exact match	2026-08-31

A recorded no-match is useful evidence that the source was checked; it is not a claim that the substance does not exist elsewhere.

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 HEXAHYDRO-TETRAMETHYL-METHANONAPHTHALENE

INCI name

HEXAHYDRO-TETRAMETHYL-METHANONAPHTHALENE

Description

(2S)-1,3,4,5,6,7-Hexahydro-1,1,5,5-tetramethyl-2H-2,4a-methanonaphthalene

Record provenance

Inventory reference: 40170
Imported identity: HEXAHYDRO-TETRAMETHYL-METHANONAPHTHALENE
Source update: 02/03/2011

European Commission CosIng source notes

Annex records for HEXAHYDRO-TETRAMETHYL-METHANONAPHTHALENE

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Key data

CAS

1135-66-6

214-494-2

Restriction

—

Function

PERFUMING: Used for perfume and aromatic raw materials.

Ingredients with overlapping formulation functions

HEXAHYDRO-TETRAMETHYL-BENZOPYRANPERFUMING

HEXAHYDRO-TETRAMETHYL-EPOXY-METHANOAZULENEPERFUMING

HEXAHYDRO-TETRAMETHYL-METHANOAZULEN-5-ONEPERFUMING

HEXAHYDRO-TETRAMETHYL-METHANOAZULEN-5-YL METHYL KETONEPERFUMING

HEXAHYDRO-TETRAMETHYL-METHANONAPHTHALENE-8-METHANOLPERFUMING

HEXAHYDRO-TETRAMETHYL-METHANONAPHTHALENE-8-METHYL ACETATEPERFUMING

HEXAHYDRO-TETRAMETHYL-METHANONAPHTHALENE-8-METHYL FORMATEPERFUMING

HEXAHYDRO-TETRAMETHYL-SPIRODIOXOLANE-METHANONAPHTHALENEPERFUMING

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 HEXAHYDRO-TETRAMETHYL-METHANONAPHTHALENE appears in the CosIng inventory

The CosIng inventory lists HEXAHYDRO-TETRAMETHYL-METHANONAPHTHALENE 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.

HEXAHYDRO-TETRAMETHYL-METHANONAPHTHALENE 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

HEXAHYDRO-TETRAMETHYL-METHANONAPHTHALENE 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, HEXAHYDRO-TETRAMETHYL-METHANONAPHTHALENE carries the following function designation(s):

PERFUMING

CAS 1135-66-6 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.

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Source note for HEXAHYDRO-TETRAMETHYL-METHANONAPHTHALENE

This page reproduces the CosIng inventory entry for HEXAHYDRO-TETRAMETHYL-METHANONAPHTHALENE 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 HEXAHYDRO-TETRAMETHYL-METHANONAPHTHALENE 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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