How do I check if my formula contains POLYMETHYLSILSESQUIOXANE/TRIMETHYLSILOXYSILICATE?

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 8664715/10/2010

POLYMETHYLSILSESQUIOXANE/TRIMETHYLSILOXYSILICATE

Polymethylsilsesquioxane/Trimethylsiloxysilicate is the product of the reaction of Polymethylsilsesquioxane and Trimethylsiloxysilicate

POLYMETHYLSILSESQUIOXANE/TRIMETHYLSILOXYSILICATE 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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What the official INCI name states

The official label is a composite INCI name with 2 named source-material segments. Each segment must be reconciled with the supplier specification.

Identity type from wording: composite
Named source segments: 2

Review parsed source-name segments

POLYMETHYLSILSESQUIOXANE
TRIMETHYLSILOXYSILICATE

This structure is derived only from the official label wording. It does not establish composition, concentration, chemical equivalence, safety or regulatory permission.

Inventory details for POLYMETHYLSILSESQUIOXANE/TRIMETHYLSILOXYSILICATE

INCI name

POLYMETHYLSILSESQUIOXANE/TRIMETHYLSILOXYSILICATE

Description

Polymethylsilsesquioxane/Trimethylsiloxysilicate is the product of the reaction of Polymethylsilsesquioxane and Trimethylsiloxysilicate

Record provenance

Inventory reference: 86647
Imported identity: POLYMETHYLSILSESQUIOXANE/TRIMETHYLSILOXYSILICATE
Source update: 15/10/2010

European Commission CosIng source notes

Annex records for POLYMETHYLSILSESQUIOXANE/TRIMETHYLSILOXYSILICATE

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Key data

CAS

—

The CosIng inventory records no CAS number for this ingredient. That is the absence of an identifier in the source, not a finding about the substance.

—

Restriction

—

Function

NOT REPORTED: No function currently reported.

Official EU ingredient-name evidence

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

#22109 · POLYMETHYLSILSESQUIOXANE/TRIMETHYLSILOXYSILICATE

Ingredients with overlapping formulation functions

POLY(1-4 BUTANEDIOL)-27NOT REPORTED

POLYACRYLATE CROSSPOLYMER-7NOT REPORTED, SKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT, SURFACTANT - FOAM BOOSTING

POLYCAPRYLYLSILSESQUIOXANENOT REPORTED

POLYESTER-33NOT REPORTED

POLYPROPANEDIOL-3NOT REPORTED

POLYSILICONE-22NOT REPORTED, VISCOSITY CONTROLLING

POLYSILICONE-23FILM FORMING, HAIR CONDITIONING, NOT REPORTED, SKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT

POLYSILICONE-32NOT REPORTED

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 POLYMETHYLSILSESQUIOXANE/TRIMETHYLSILOXYSILICATE appears in the CosIng inventory

The CosIng inventory lists POLYMETHYLSILSESQUIOXANE/TRIMETHYLSILOXYSILICATE 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.

POLYMETHYLSILSESQUIOXANE/TRIMETHYLSILOXYSILICATE 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

POLYMETHYLSILSESQUIOXANE/TRIMETHYLSILOXYSILICATE 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, POLYMETHYLSILSESQUIOXANE/TRIMETHYLSILOXYSILICATE carries the following function designation(s):

NOT REPORTED

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Source note for POLYMETHYLSILSESQUIOXANE/TRIMETHYLSILOXYSILICATE

This page reproduces the CosIng inventory entry for POLYMETHYLSILSESQUIOXANE/TRIMETHYLSILOXYSILICATE 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 POLYMETHYLSILSESQUIOXANE/TRIMETHYLSILOXYSILICATE 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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