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CAS 3069-40-7 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 3874015/10/2010

TRIMETHOXYCAPRYLYLSILANE

Trimethoxyoctylsilane

TRIMETHOXYCAPRYLYLSILANE 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 3069-40-7

CAS 3069-40-7PubChem CID 76485

Trimethoxycaprylylsilane

IUPAC name: trimethoxy(octyl)silane

Molecular formula: C11H26O3Si
Molecular weight: 234.41 g/mol
Exact mass: 234.16512122 Da
Topological polar surface area: 27.7 Å²
Hydrogen-bond donors: 0
Hydrogen-bond acceptors: 3
Covalent units: 1
Defined stereocentres: 0

Also known as

TrimethoxyoctylsilaneOctyltrimethoxysilaneSilane, trimethoxyoctyl-FZ07E4LW2MEINECS 221-338-7EC 221-338-7RefChem:899730TRIMETHOXYCAPRYLYLSILANE [INCI]

15 more reported names

221-338-7N-OctyltrimethoxysilaneUNII-FZ07E4LW2MC11H26O3SiTrimethoxy-n-octylsilane1-(Trimethoxysilyl)octanetrimethoxy-octylsilaneHydrophobicity silanesTrimethoxy(octyl)silane, 96%NMEPHPOFYLLFTK-UHFFFAOYSA-Synonym(s): OctyltrimethoxysilaneNMEPHPOFYLLFTK-UHFFFAOYSA-NDS-4069CS-0147110InChI=1/C11H26O3Si/c1-5-6-7-8-9-10-11-15(12-2,13-3)14-4/h5-11H2,1-4H3

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

EPA DTXSID:DTXSID80863094
PubMed:22806471
PubMed:21936378
PubMed:20615283
PubMed:19782372
PubMed:19428242
PubMed:18462785
PubMed:18196532
PubMed:17592866
PubMed:17154592
PubMed:17111405
PubMed:15792535

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 TRIMETHOXYCAPRYLYLSILANE

INCI name

TRIMETHOXYCAPRYLYLSILANE

Description

Trimethoxyoctylsilane

Record provenance

Inventory reference: 38740
Imported identity: TRIMETHOXYCAPRYLYLSILANE
Source update: 15/10/2010

European Commission CosIng source notes

Annex records for TRIMETHOXYCAPRYLYLSILANE

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Key data

CAS

3069-40-7

221-338-7

Restriction

—

Function

BINDING: Providing adhesive properties during and after compression in cosmetic tablets and/or cakes.
SMOOTHING: Seeking to achieve an even skin surface by decreasing roughness or irregularities.

Official EU ingredient-name evidence

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

#29255 · TRIMETHOXYCAPRYLYLSILANE

Ingredients with overlapping formulation functions

SOLANUM TUBEROSUM PULP EXTRACTSMOOTHING

SPIRULINA MAXIMA EXTRACTSMOOTHING

TAMARINDUS INDICA EXTRACTKERATOLYTIC, SMOOTHING

TILIA CORDATA EXTRACTREFRESHING, SKIN CONDITIONING, SKIN PROTECTING, SMOOTHING, SOOTHING

VANILLA PLANIFOLIA FRUITFRAGRANCE, SKIN PROTECTING, SMOOTHING

VANILLA PLANIFOLIA FRUIT EXTRACTSKIN CONDITIONING, SKIN PROTECTING, SMOOTHING

VERBASCUM THAPSUS EXTRACTSKIN CONDITIONING, SMOOTHING

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 TRIMETHOXYCAPRYLYLSILANE appears in the CosIng inventory

The CosIng inventory lists TRIMETHOXYCAPRYLYLSILANE 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.

TRIMETHOXYCAPRYLYLSILANE 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

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

CAS 3069-40-7 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 TRIMETHOXYCAPRYLYLSILANE

This page reproduces the CosIng inventory entry for TRIMETHOXYCAPRYLYLSILANE 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 TRIMETHOXYCAPRYLYLSILANE 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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