Is DIMETHICONOL safe to use in EU cosmetics?

DIMETHICONOL is listed in the EU CosIng ingredient inventory with no direct annex restriction records linked at this time. Always verify against the current official CosIng database before formulating.

What function does DIMETHICONOL serve in cosmetics?

According to the EU CosIng inventory, DIMETHICONOL carries the following function designation(s): ANTIFOAMING, MOISTURISING, SKIN CONDITIONING - EMOLLIENT.

How do I check if my formula contains DIMETHICONOL?

Use the INCI Checker to screen a full ingredient list across selected markets, or use the substance market comparison to review this identity across all supported market datasets.

InventoryRef 7558815/10/2010

DIMETHICONOL

Poly[oxy(dimethylsilylane)], .alpha.-hydro-.omega.-hydroxy-

DIMETHICONOL 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 31692-79-2

CAS 31692-79-2PubChem CID 14014

Dimethylsilanediol

Dimethylsilanediol is an organosilanediol. — ChEBI

IUPAC name: dihydroxy(dimethyl)silane

Molecular formula: C2H8O2Si
Molecular weight: 92.17 g/mol
Exact mass: 92.029356028 Da
Topological polar surface area: 40.5 Å²
Hydrogen-bond donors: 2
Hydrogen-bond acceptors: 2
Covalent units: 1
Defined stereocentres: 0

Also known as

1066-42-8Silanediol, dimethyl-DNZ4KJE28USilanediol, 1,1-dimethyl-CHEBI:23816RefChem:134378213-915-71,1-Dimethylsilanediol

15 more reported names

Simethicone Impurity 10Polydimethylsiloxane, hydroxy terminated, M.W. 42001,1-Dimethylsilanediol >90%Hydroxy-terminated poly(dimethylsiloxane)DimethiconolDihydroxydimethylsilaneC2H8O2SiDihydroxydimethylsilane; Dimethyldihydroxysilane; Dimethylsilanediol;EINECS 213-915-7Dimethylsilanediol #Si(OH)2Me2UNII-DNZ4KJE28U(CH3)2Si(OH)2Masil SFR 150,000 CGPOLY(DIMETHYLSILOXANE) HYDROXY TERMINATED

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

ChEBI:CHEBI:23816
EPA DTXSID:DTXSID2061434
PubMed:22764615
PubMed:22304371
PubMed:21423891
PubMed:18755397
PubMed:17194220
PubMed:10224038
PubMed:8953708

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 DIMETHICONOL

INCI name

DIMETHICONOL

Description

Poly[oxy(dimethylsilylane)], .alpha.-hydro-.omega.-hydroxy-

Record provenance

Inventory reference: 75588
Imported identity: DIMETHICONOL
Source update: 15/10/2010

European Commission CosIng source notes

Annex records for DIMETHICONOL

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Key data

CAS

31692-79-2 / 70131-67-8

—

Restriction

—

Function

ANTIFOAMING: Suppressing foam during manufacturing or reducing the tendency of finished products to generate foam.
MOISTURISING: Increasing the water content of the skin and keeping it soft and smooth.
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.

#8908 · DIMETHICONOL

Ingredients with overlapping formulation functions

DIBUTYL FUMARATE/HEXADECENE/TETRADECENE COPOLYMERANTIFOAMING

DIISOAMYL SEBACATEANTIFOAMING, HAIR CONDITIONING, PLASTICISER, SKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT, SKIN…

DIMETHICONEANTIFOAMING, SKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT, SKIN PROTECTING

DIMETHICONE SILYLATEANTIFOAMING

DIPHENYL DIMETHICONEANTIFOAMING, HAIR CONDITIONING, SKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT, SURFACTANT - EMUL…

DIPHENYLSILOXY PHENYL TRIMETHICONEANTIFOAMING, HAIR CONDITIONING, SKIN CONDITIONING

DISILOXANEANTIFOAMING, SKIN CONDITIONING

FUSEL WHEAT BRAN/STRAW GLYCOSIDESANTIFOAMING, SOLVENT, SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING, SURFACTANT - HYDROTROPE

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 DIMETHICONOL appears in the CosIng inventory

The CosIng inventory lists DIMETHICONOL 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.

DIMETHICONOL is also tagged with 3 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

DIMETHICONOL 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, DIMETHICONOL carries the following function designation(s):

CAS 31692-79-2 / 70131-67-8 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.

Use the INCI Checker to screen a full ingredient list across selected markets, or compare this substance across all supported market datasets.

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Source note for DIMETHICONOL

This page reproduces the CosIng inventory entry for DIMETHICONOL 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 DIMETHICONOL 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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