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CAS 3982-82-9 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 8072715/10/2010

TETRAMETHYL TETRAPHENYL TRISILOXANE

1,3,3,5-tetramethyl-1,1,5,5-tetraphenyltrisiloxane

TETRAMETHYL TETRAPHENYL 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 3982-82-9

CAS 3982-82-9PubChem CID 19882

1,3,3,5-Tetramethyl-1,1,5,5-tetraphenyltrisiloxane

IUPAC name: dimethyl-bis[[methyl(diphenyl)silyl]oxy]silane

Molecular formula: C28H32O2Si3
Molecular weight: 484.8 g/mol
Exact mass: 484.17100986 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

1,1,5,5-Tetraphenyl-1,3,3,5-tetramethyltrisiloxaneEINECS 223-620-56IOT4Y7V2BTrisiloxane, 1,3,3,5-tetramethyl-1,1,5,5-tetraphenyl-DOW CORNING 704HIVAC F 4SILICONE DC 704TETRAMETHYL TETRAPHENYL TRISILOXANE

16 more reported names

DIMETHYLBIS(METHYLDIPHENYLSILYLOXY)SILANERefChem:412311Dow Corning Silicone Diffusion Pump Fluids 7041,3,3,5Tetramethyl1,1,5,5tetraphenyltrisiloxaneTETRAMETHYL TETRAPHENYL TRISILOXANE [INCI]Trisiloxane, 1,3,3,5tetramethyl1,1,5,5tetraphenyl223-620-51,1,5,5-Tetraphenyltetramethyltrisiloxane1,3,3,5-tetramethyl-1,1,5,5-tetraphenyl-trisiloxaneC28H32O2Si3UNII-6IOT4Y7V2BYFCVAZGXPLMNDG-UHFFFAOYSA-NDC 704DB-049486Dow Corning(R) silicone diffusion pump fluids, 702Dow Corning(R) silicone diffusion pump fluids, 704

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External database identifiers

EPA DTXSID:DTXSID2052073

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 TETRAPHENYL TRISILOXANE

INCI name

TETRAMETHYL TETRAPHENYL TRISILOXANE

Description

1,3,3,5-tetramethyl-1,1,5,5-tetraphenyltrisiloxane

Record provenance

Inventory reference: 80727
Imported identity: TETRAMETHYL TETRAPHENYL TRISILOXANE
Source update: 15/10/2010

European Commission CosIng source notes

Annex records for TETRAMETHYL TETRAPHENYL TRISILOXANE

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Key data

CAS

3982-82-9

223-620-5

Restriction

—

Function

SKIN CONDITIONING: Maintaining the skin in good condition.
SKIN CONDITIONING - EMOLLIENT: Acting as lubricants on the skin surface providing the skin with a soft and smooth appearance.

Official EU ingredient-name evidence

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

#28589 · TETRAMETHYL TETRAPHENYL TRISILOXANE

Ingredients with overlapping formulation functions

TETRADECYLOCTADECYL HEXYLDECANOATESKIN CONDITIONING - EMOLLIENT

TETRADECYLPROPIONATESSKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT, SOLVENT

TETRADENIA RIPARIA LEAF FERMENT OILANTIOXIDANT; SKIN CONDITIONING - EMOLLIENT; SKIN CONDITIONING - HUMECTANT

TETRAHYDROFURFURYL RICINOLEATESKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT

TETRAPEPTIDE-119SKIN CONDITIONING - EMOLLIENT; SKIN CONDITIONING - HUMECTANT

TETRAPEPTIDE-121SKIN CONDITIONING - EMOLLIENT; SKIN CONDITIONING - MISCELLANEOUS

TETRAPEPTIDE-77SKIN CONDITIONING - EMOLLIENT

TETRAPEPTIDE-81SKIN CONDITIONING - EMOLLIENT

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 TETRAPHENYL TRISILOXANE appears in the CosIng inventory

The CosIng inventory lists TETRAMETHYL TETRAPHENYL 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.

TETRAMETHYL TETRAPHENYL 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

TETRAMETHYL TETRAPHENYL 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, TETRAMETHYL TETRAPHENYL TRISILOXANE carries the following function designation(s):

CAS 3982-82-9 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 TETRAPHENYL TRISILOXANE

This page reproduces the CosIng inventory entry for TETRAMETHYL TETRAPHENYL 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 TETRAMETHYL TETRAPHENYL 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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