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CAS 17861-60-8 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 5606815/10/2010

ETHYL TRISILOXANE

3-Ethylheptamethyltrisiloxane

ETHYL TRISILOXANE 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 17861-60-8

CAS 17861-60-8PubChem CID 140291

Ethyl trisiloxane

IUPAC name: ethyl-methyl-bis(trimethylsilyloxy)silane

Molecular formula: C9H26O2Si3
Molecular weight: 250.56 g/mol
Exact mass: 250.12405967 Da
Topological polar surface area: 18.5 Å²
Hydrogen-bond donors: 0
Hydrogen-bond acceptors: 2
Covalent units: 1
Defined stereocentres: 0

Also known as

3-ethylheptamethyltrisiloxaneTrisiloxane, 3-ethyl-1,1,1,3,5,5,5-heptamethyl-3-ETHYL-1,1,1,3,5,5,5-HEPTAMETHYLTRISILOXANEUNII-ZH1WJO5481ZH1WJO5481SILSOFT ETSBOTANISIL VS-3RefChem:139067

5 more reported names

ETHYL TRISILOXANE [INCI]469-070-1C9H26O2Si3HLPWCQDWRYCGLK-UHFFFAOYSA-NDB-315420

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External database identifiers

EPA DTXSID:DTXSID80170518

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 ETHYL TRISILOXANE

INCI name

ETHYL TRISILOXANE

Description

3-Ethylheptamethyltrisiloxane

Record provenance

Inventory reference: 56068
Imported identity: ETHYL TRISILOXANE
Source update: 15/10/2010

European Commission CosIng source notes

Annex records for ETHYL TRISILOXANE

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Key data

CAS

17861-60-8

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Restriction

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Function

SKIN CONDITIONING: Maintaining the skin in good condition.
VISCOSITY CONTROLLING: Increasing or decreasing the viscosity (thickness) of cosmetics.

Official EU ingredient-name evidence

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

#10133 · ETHYL TRISILOXANE

Ingredients with overlapping formulation functions

ETHOXYETHANOLSOLVENT, VISCOSITY CONTROLLING

ETHYL AZELAIC ACID/PROPANEDIOL COPOLYMERPLASTICISER, SKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT, SOLVENT, VISCOSITY CONTROLLING

ETHYL METHACRYLATEVISCOSITY CONTROLLING

ETHYL METHYLPHENYLGLYCIDATEPERFUMING, VISCOSITY CONTROLLING

ETHYLCELLULOSEBINDING, FILM FORMING, VISCOSITY CONTROLLING

ETHYLENE BIS-HYDROXYSTEARAMIDEVISCOSITY CONTROLLING

ETHYLENE DIHYDROGENATED TALLOWAMIDESKIN CONDITIONING, SURFACTANT - EMULSIFYING, VISCOSITY CONTROLLING

ETHYLENE DILINOLEAMIDEVISCOSITY CONTROLLING

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 ETHYL TRISILOXANE appears in the CosIng inventory

The CosIng inventory lists ETHYL TRISILOXANE 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.

ETHYL TRISILOXANE 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

ETHYL TRISILOXANE 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, ETHYL TRISILOXANE carries the following function designation(s):

CAS 17861-60-8 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 ETHYL TRISILOXANE

This page reproduces the CosIng inventory entry for ETHYL TRISILOXANE 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 ETHYL TRISILOXANE 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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