How do I check if my formula contains ETHYL POLYSILSESQUIOXANE?

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InventoryRef 9323429/09/2015

ETHYL POLYSILSESQUIOXANE

ETHYL POLYSILSESQUIOXANE 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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Exact external identity check

not_found

No complete-name PubChem match was verified. The material may be a mixture, trade-style INCI identity or be indexed under another identifier; this result must not be read as proof that no related chemistry exists.

Exact CosIng INCI name equals a PubChem synonym · Checked 2026-08-31

Inventory details for ETHYL POLYSILSESQUIOXANE

INCI name

ETHYL POLYSILSESQUIOXANE

Description

Ethyl Polysilsesquioxane is a resinous material composed of a mixture of three-dimensional siloxane polymers and oligomers with cage structures. For the oligomers, each silicon atom in the polysilsesquioxane is connected via oxygen atoms to three other silicon atoms and can be represented by the empirical formulation RSiO3/2, where R represents the ethyl group. For the larger polymeric polysilsesquioxanes, some of the silicon atoms are not connected to other silicon atoms and instead have a silanol (SiOH) group. Ethyl Polysilsesquioxane is prepared by the hydrolysis and condensation of ethyl trimethoxysilane.

Record provenance

Inventory reference: 93234
Imported identity: ETHYL POLYSILSESQUIOXANE
Source update: 29/09/2015

European Commission CosIng source notes

Annex records for ETHYL POLYSILSESQUIOXANE

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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.

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Restriction

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Function

NAIL CONDITIONING: Improving and/or enhancing the cosmetic characteristics of the nail (moisturizing, increasing sheen, reducing brittleness and flaking, etc.).

Official EU ingredient-name evidence

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

#10117 · ETHYL POLYSILSESQUIOXANE

Ingredients with overlapping formulation functions

DIPENTAERYTHRITYL PENTAACRYLATEFILM FORMING, NAIL CONDITIONING

DODECYL PG-AMINOETHYL DISULFIDE KERATINEMULSION STABILISING, HAIR CONDITIONING, NAIL CONDITIONING

ECHINACEA ANGUSTIFOLIA ROOT EXTRACTHAIR CONDITIONING, NAIL CONDITIONING, SKIN CONDITIONING

EPOXYCYCLOHEXYLETHYL POLYSILSESQUIOXANENAIL CONDITIONING

ETHYL TAFLUPROSTAMIDEHAIR CONDITIONING, NAIL CONDITIONING

ETHYLHEXYL ACRYLATE/STYRENE COPOLYMERBINDING, NAIL CONDITIONING

FISH SCALE EXTRACTANTIPLAQUE, NAIL CONDITIONING, ORAL CARE

FRAGARIA ANANASSA SEED OILANTI-SEBORRHEIC, ANTIOXIDANT, HAIR CONDITIONING, NAIL CONDITIONING, 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 ETHYL POLYSILSESQUIOXANE appears in the CosIng inventory

The CosIng inventory lists ETHYL POLYSILSESQUIOXANE 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 POLYSILSESQUIOXANE 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

ETHYL POLYSILSESQUIOXANE 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 POLYSILSESQUIOXANE carries the following function designation(s):

NAIL CONDITIONING

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Source note for ETHYL POLYSILSESQUIOXANE

This page reproduces the CosIng inventory entry for ETHYL POLYSILSESQUIOXANE 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 POLYSILSESQUIOXANE 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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