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Sigma-Aldrich

Trimethoxy(octyl)silane

96%

Synonym(s):

Octyltrimethoxysilane

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About This Item

Linear Formula:
CH3(CH2)7Si(OCH3)3
CAS Number:
3069-40-7
Molecular Weight:
234.41
Beilstein:
1926957
EC Number:
221-338-7
MDL number:
MFCD00043053
UNSPSC Code:
12352103
PubChem Substance ID:
24863429
NACRES:
NA.23

Assay

96%

form

liquid

refractive index

n20/D 1.416 (lit.)

density

0.907 g/mL at 25 °C (lit.)

SMILES string

CCCCCCCC[Si](OC)(OC)OC

InChI

1S/C11H26O3Si/c1-5-6-7-8-9-10-11-15(12-2,13-3)14-4/h5-11H2,1-4H3

InChI key

NMEPHPOFYLLFTK-UHFFFAOYSA-N

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General description

Trimethoxy(octyl)silane (TMOS) is an organosilane that is used as a coupling and surface modifying agent to enhance the water contact angle and lower the surface energy.
Trimethoxy(octyl)silane is an organosilane. The effect of hydrolyzed silane on the penetration of water into a lamellar liquid crystal was studied.

Application

Trimethoxy(octyl)silane (TMOS) is used to functionalize the surface of silica to promote the adhesion with gold nanoparticles (AuNPs) for use in the fabrication of acrylate nanocomposite based photonic devices. It can be coated on silica fiber based epoxy to improve the hydrophobic characteristics and to protect the surface from corrosion.
Trimethoxy(octyl)silane was used for the silanization of silica nanoparticles. Surface modification of hydrophobic (T805) titania particles with the silane was reported.

Pictograms

Skull and crossbones
GHS06

Signal Word

Danger

Hazard Statements

H315,H331

Hazard Classifications

Acute Tox. 3 Inhalation - Skin Irrit. 2

Storage Class Code

6.1C - Combustible acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects

WGK

WGK 1

Flash Point(F)

203.0 °F - closed cup

Flash Point(C)

95 °C - closed cup

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Hydrolysis and condensation of octyltrimethoxysilane in nonionic liquid crystals
Colloids and Surfaces. A, Physicochemical and Engineering Aspects, 88(2-3), 235-241 (1994)
Elena Buratti et al.
Polymers, 12(11) (2020-11-14)
In this work, soft microgels of Poly(N-Isopropylacrylamide) (PNIPAm) at two different sizes and of interpenetrated polymer network (IPN) composed of PNIPAm and Poly(Acrylic Acid) (PAAc) were synthesized. Then, solutions of these different types of microgels have been spin-coated on glass
Controlled synthesis of hierarchical ZSM-5 for catalytic fast pyrolysis of cellulose to aromatics.
Chen H, et al.
Journal of Material Chemistry A, 6(42), 21178-21185 (2018)
Ruixia Gao et al.
Talanta, 150, 46-53 (2016-02-04)
In this work, a novel Cu(2+)-mediated core-shell bovine hemoglobin imprinted superparamagnetic polymers were synthesized. First, carboxyl group directly-functionalized Fe3O4 nanoparticles were produced by a facile one-pot hydrothermal method. Next, copper ions were introduced to chelate with carboxyl groups and further
Ziling Peng et al.
Chemosphere, 201, 110-118 (2018-03-09)
Usually, nanoscale zero-valent iron (NZVI) cannot float on water because of high density and hydrophilic surface. Herein, alkyltrimethoxysilanes with different carbon chain lengths (C1, C8 and C16) were used as "water-repellent legs" to graft onto NZVI, enduing NZVI with hydrophobic
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