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Sigma-Aldrich

Triethoxy(octyl)silane

97%

Synonym(s):

Octyltriethoxysilane

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About This Item

Linear Formula:
CH3(CH2)7Si(OC2H5)3
CAS Number:
2943-75-1
Molecular Weight:
276.49
Beilstein:
2325287
EC Number:
220-941-2
MDL number:
MFCD00039883
UNSPSC Code:
12352103
PubChem Substance ID:
24867577
NACRES:
NA.23

Assay

97%

form

liquid

refractive index

n20/D 1.417 (lit.)

bp

84-85 °C/0.5 mmHg (lit.)

density

0.88 g/mL at 25 °C (lit.)

SMILES string

CCCCCCCC[Si](OCC)(OCC)OCC

InChI

1S/C14H32O3Si/c1-5-9-10-11-12-13-14-18(15-6-2,16-7-3)17-8-4/h5-14H2,1-4H3

InChI key

MSRJTTSHWYDFIU-UHFFFAOYSA-N

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General description

Triethoxy(octyl)silane (TEOS) is an alkoxide organosilane with four ethyl ester sidechains. It is used as a self-assembled monolayer and provides a hydrophobic coating with low surface energy. The water contact angle is in the range of 150-170°.

Application

Aluminium alloy can be coated with TEOS and 1H, 1H, 2H, 2H perfluorooctyl trichloro silane (PFOTS) to obtain superhydrophobicity with a high contact angle of 160-170° for vessel hulls and marine systems. It may be used to stabilize the porosity for a colorimetric sensor for immediate color changes, which finds potential application in the detection of toxic gases. It may also be used in the production of hybrid zeolites.
Triethoxy(octyl)silane may be used to prepare several formulations for fabricating low-cost, colorimetric sensor arrays to detect toxic gases.

Pictograms

Exclamation mark
GHS07

Signal Word

Warning

Hazard Statements

H315

Hazard Classifications

Skin Irrit. 2

Storage Class Code

10 - Combustible liquids

WGK

WGK 1

Flash Point(F)

212.0 °F - closed cup

Flash Point(C)

100 °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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Petkowicz I, et al.
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