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Silanes and silicones

Trimethoxycaprylylsilane

Also known as Trimethoxyoctylsilane, Octyltrimethoxysilane, Silane, trimethoxyoctyl-

CAS 3069-40-7Formula C11H26O3SiMolar mass 234.41 g/molEC 221-338-7
GHS signal word: Danger. Pictograms: Acute toxicity (severe), Harmful or irritant 12 suppliers listed
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Trimethoxycaprylylsilane chemical structure, C11H26O3Si, CAS 3069-40-7
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
3069-40-7
Formula
C11H26O3Si
Molar mass
234.41 g/mol
Physical form
Liquid
HS code
293190
Category
Silanes and silicones
Illustrative photo, 25 litre white jerry cans of liquid in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is Trimethoxycaprylylsilane?

Plain description, key identifiers and synonyms

Trimethoxycaprylylsilane is a chemical substance with the molecular formula C11H26O3Si and a molar mass of 234.41 g/mol. Its CAS registry number is 3069-40-7. The IUPAC name is trimethoxy(octyl)silane.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
trimethoxy(octyl)silane
CAS number
3069-40-7 CAS number cross-checked
EC number
221-338-7
Molecular formula
C11H26O3Si
UNII
FZ07E4LW2M
MDL number
MFCD00043053
INCI name
TRIMETHOXYCAPRYLYLSILANE
InChIKey
NMEPHPOFYLLFTK-UHFFFAOYSA-N
InChI
InChI=1S/C11H26O3Si/c1-5-6-7-8-9-10-11-15(12-2,13-3)14-4/h5-11H2,1-4H3
SMILES (canonical and isomeric)
CCCCCCCC[Si](OC)(OC)OC

Synonyms

  • Trimethoxyoctylsilane
  • Octyltrimethoxysilane
  • Silane, trimethoxyoctyl-
  • Trimethoxy(octyl)silane
  • N-Octyltrimethoxysilane
  • Trimethoxy-n-octylsilane
  • 1-(Trimethoxysilyl)octane
  • trimethoxy-octylsilane
  • Hydrophobicity silanes
  • Trimethoxy(octyl)silane, 96%
  • Nmephpofyllftk-uhfffaoysa-
  • Synonym(s): Octyltrimethoxysilane

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

Physical form
Liquidexp.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
234.41 g/molcalc.
Exact mass
234.1651 Dacalc.
LogP (octanol/water)
3.23calc.
Topological polar surface area
27.69 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
3calc.
Rotatable bonds
10calc.
Heavy atoms
15calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
1calc.
Formal charge
0calc.
Stereocentres
0calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Danger
GHS06: Acute toxicity (severe)
Acute toxicity (severe)
GHS07: Harmful or irritant
Harmful or irritant

Hazard statements

  • H315Causes skin irritation.
  • H331Toxic if inhaled.
  • H332Harmful if inhaled.
Precautionary statements (14)
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P271Use only outdoors or in a well-ventilated area.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P302 + P352If on skin: Wash with plenty of water.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P316Get emergency medical help immediately.
  • P317Get medical help.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P332 + P317If skin irritation occurs: Get medical help.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P403 + P233Store in a well-ventilated place. Keep container tightly closed.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

Trimethoxycaprylylsilane suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

All 12 suppliers
12 of 12 offers

Suppliers marked Unclaimed profile have not claimed their profile yet. They are not verified by CompoundList, their offers are price on request and details may have changed, so please confirm them with the supplier. Company representatives can claim a profile with a business email on the company's own website domain. Our team verifies each claim and sends the result by email.

Where suppliers are based

12 suppliers in 4 countries

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Trimethoxycaprylylsilane price

Indicative price range per kg from live supplier offers

No published prices right now

Suppliers quote this chemical on request. Send one free request and compare quotes side by side.

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Uses and applications

What the substance is used for, by industry and function

Use classes: Cosmetics.

Cosmetic ingredient, INCI name TRIMETHOXYCAPRYLYLSILANE(binding, smoothing)

Functional uses

  • Adhesion/cohesion promoter
  • Binder
  • Chemical reaction regulator
  • Dispersing agent
  • Humectant
  • Surface modifier

Cosmetic functions

  • Binding
  • Smoothing

Regulatory status

Inventories, regulations and trade controls that list this substance

Health and food

  • EU cosmetic ingredient inventory

United States

  • TSCA inventory (USA)
    Status: Active in US commerce, Regulatory flags: Added by a premanufacture notice

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Trimethoxycaprylylsilane is traded under.

HS 2931.90Indicative HS code

Organo-inorganic compounds, other than tetramethyl lead, tetraethyl lead, tributyltin compounds…

World exports in 2024
$3.97B
+5.3% vs 2023, imports $3.93B
2019 to 2024
Top exporters
  1. China28.3%
  2. United States15.6%
  3. Germany15.1%
Top importers
  1. United States14.6%
  2. China13.0%
  3. South Korea8.5%
Reported customs values in USD, not prices.Full trade data

The HS code shown for Trimethoxycaprylylsilane is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Trimethoxycaprylylsilane, based on the data on this page

What is Trimethoxycaprylylsilane?

Trimethoxycaprylylsilane is a chemical substance with the molecular formula C11H26O3Si and a molar mass of 234.41 g/mol. Its CAS registry number is 3069-40-7. The IUPAC name is trimethoxy(octyl)silane.

What is the CAS number of Trimethoxycaprylylsilane?

The CAS registry number of Trimethoxycaprylylsilane is 3069-40-7.

What is the molecular formula and weight of Trimethoxycaprylylsilane?

The molecular formula of Trimethoxycaprylylsilane is C11H26O3Si and its molar mass is 234.41 g/mol.

What is Trimethoxycaprylylsilane used for?

Use classes: Cosmetics.

Is Trimethoxycaprylylsilane hazardous?

Trimethoxycaprylylsilane carries the GHS signal word "Danger". Main hazards: causes skin irritation, toxic if inhaled, harmful if inhaled. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Trimethoxycaprylylsilane?

Trimethoxycaprylylsilane is usually classified under HS code 293190 (X. ORGANO-INORGANIC COMPOUNDS, HETEROCYCLIC COMPOUNDS, NUCLEIC ACIDS AND THEIR SALTS…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Trimethoxycaprylylsilane?

CompoundList lists 12 suppliers of Trimethoxycaprylylsilane in China, United States, Germany and Japan. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Trimethoxycaprylylsilane?

Suppliers quote Trimethoxycaprylylsilane on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Trimethoxycaprylylsilane

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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