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CAS 365411-50-3 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 8311515/10/2010

PENTAMETHYL OCTAHYDROINDENODIOXANE

Indeno[4,5-d]-1,3-dioxin,4,4a,5,6,7,8,9,9b-octahydro-7,7,8,9,9-pentamethyl

PENTAMETHYL OCTAHYDROINDENODIOXANE 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.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 365411-50-3

CAS 365411-50-3PubChem CID 15552386

Pentamethyl octahydroindenodioxane

IUPAC name: 7,7,8,9,9-pentamethyl-4,4a,5,6,8,9b-hexahydrocyclopenta[h][1,3]benzodioxine

Molecular formula: C16H26O2
Molecular weight: 250.38 g/mol
Exact mass: 250.193280068 Da
XLogP3: 3.1
Topological polar surface area: 18.5 Å²
Hydrogen-bond donors: 0
Hydrogen-bond acceptors: 2
Covalent units: 1
Defined stereocentres: 0

Also known as

NEBULONE3A152H3F7RIndeno(4,5-d)-1,3-dioxin, 4,4a,5,6,7,8,9,9b-octahydro-7,7,8,9,9-pentamethyl-Indeno[4,5-d]-1,3-dioxin, 4,4a,5,6,7,8,9,9b-octahydro-7,7,8,9,9-pentamethyl-RefChem:859834PENTAMETHYL OCTAHYDROINDENODIOXANE [INCI]Indeno4,5-d-1,3-dioxin, 4,4a,5,6,7,8,9,9b-octahydro-7,7,8,9,9-pentamethyl-UNII-3A152H3F7R

2 more reported names

NJQDALIDWNJDSW-UHFFFAOYSA-N7,7,8,9,9-Pentamethyl-4,4a,5,6,7,8,9,9b-octahydro-2H-indeno[4,5-d][1,3]dioxine

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

EPA DTXSID:DTXSID80889173

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 PENTAMETHYL OCTAHYDROINDENODIOXANE

INCI name

PENTAMETHYL OCTAHYDROINDENODIOXANE

Description

Indeno[4,5-d]-1,3-dioxin,4,4a,5,6,7,8,9,9b-octahydro-7,7,8,9,9-pentamethyl

Record provenance

Inventory reference: 83115
Imported identity: PENTAMETHYL OCTAHYDROINDENODIOXANE
Source update: 15/10/2010

European Commission CosIng source notes

Annex records for PENTAMETHYL OCTAHYDROINDENODIOXANE

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Key data

CAS

365411-50-3

446-220-4

Restriction

—

Function

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

Official EU ingredient-name evidence

The ingredient name exactly matches the official 2025 EU glossary of common ingredient names.

#20340 · PENTAMETHYL OCTAHYDROINDENODIOXANE

Ingredients with overlapping formulation functions

PELARGONIUM GRAVEOLENS OILFRAGRANCE, PERFUMING

PELARGONIUM GRAVEOLENS WAXFRAGRANCE

PENTADECALACTONEFRAGRANCE, PERFUMING

PENTAFLUOROPROPANEFRAGRANCE, PROPELLANT, SOLVENT

PERILLA FRUTESCENS LEAF EXTRACTFRAGRANCE, SKIN CONDITIONING

PERILLA FRUTESCENS LEAF WATERFRAGRANCE

PERILLA OCYMOIDES LEAF/STEM OILFRAGRANCE

PERILLALDEHYDEFRAGRANCE, 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 PENTAMETHYL OCTAHYDROINDENODIOXANE appears in the CosIng inventory

The CosIng inventory lists PENTAMETHYL OCTAHYDROINDENODIOXANE 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.

PENTAMETHYL OCTAHYDROINDENODIOXANE 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

PENTAMETHYL OCTAHYDROINDENODIOXANE 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, PENTAMETHYL OCTAHYDROINDENODIOXANE carries the following function designation(s):

FRAGRANCE

CAS 365411-50-3 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 PENTAMETHYL OCTAHYDROINDENODIOXANE

This page reproduces the CosIng inventory entry for PENTAMETHYL OCTAHYDROINDENODIOXANE 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 PENTAMETHYL OCTAHYDROINDENODIOXANE 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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Tools & next steps

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