Triethoxyoctylsilane Chemical Properties

Melting point:

<-40°C

Boiling point:

84-85 °C0.5 mm Hg(lit.)

Density 

0.88 g/mL at 25 °C(lit.)

vapor pressure 

0.1 hPa (20 °C)

refractive index 

n20/D 1.417(lit.)

Flash point:

210 °F

storage temp. 

Store below +30°C.

solubility 

Acetonitrile (Slightly), Chloroform (Slightly)

form 

liquid

Specific Gravity

0.875

color 

Colorless to Almost colorless

Odor

Mild odor

Water Solubility 

reacts

Sensitive 

Moisture Sensitive

Hydrolytic Sensitivity

7: reacts slowly with moisture/water

BRN 

2325287

InChIKey

MSRJTTSHWYDFIU-UHFFFAOYSA-N

LogP

-0.3-6.41 at 20℃

CAS DataBase Reference

2943-75-1(CAS DataBase Reference)

NIST Chemistry Reference

N-Octyltriethoxysilane(2943-75-1)

EPA Substance Registry System

Triethoxyoctylsilane (2943-75-1)

Safety Information

Hazard Codes 

Xi

Risk Statements 

36/37/38

Safety Statements 

26-36-37/39

WGK Germany 

1

RTECS 

VV6695500

F 

10-21

TSCA 

Yes

HS Code 

29310095

Toxicity

LD50 orally in Rabbit: 5110 mg/kg LD50 dermal Rabbit 5142 mg/kg

MSDS

• Language:English Provider:Triethoxyoctylsilane
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Triethoxyoctylsilane Usage And Synthesis

Description

Triethoxyoctylsilane is a monomeric medium-chain alkylfunctional silane. It is a clear colourless liquid and soluble in common non-polar organic solvent.
Triethoxyoctylsilane can be used as a surface modifier to generate hydrophobicity (e.g. on concrete, glass, inorganic pigments, or mineral fillers).
When diluted with an appropriate solvent, it can be used in the formulation of water repellent products. Upon proper application, the formulated product will penetrate and provide water repellency by chemically reacting with the cementitious substrate. Treated substrates are hydrophobic and retain their original appearance.

Chemical Properties

Colorless transparent liquid

Uses

Triethoxy(octyl)silane is a hydrophobization agent used to limit coalescence in solid-stabilized emulsions.

Definition

ChEBI: Octyltriethoxysilane is an organosilicon compound.

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°.

Synthesis

The typical experimental procedure (Table 2, entry 1) was as follows: Ni(acac)2 (1a) (1.3 mg, 0.005 mmol) was dissolved in THF (5 mL) at room temperature, and 1-octene (112 mg, 1.0 mmol) and triethoxysilane (164 mg, 1.0 mmol) were added sequentially under stirring. After stirring the mixed solution for 1 min, NaBHEt3 (1.0 M in THF, 5 mL, 0.005 mmol) was added and the reaction mixture was subsequently heated to 50 °C. This temperature was maintained and the reaction progress was monitored by gas chromatography (GLC). Upon completion of the reaction, homotrimethylbenzene (60 mg, 0.50 mmol) was added to the mixture as an internal standard.GLC analysis showed the products to be n-octyltriethoxysilane (0.90 mmol, 90%) and tetraethyl silicate (0.05 mmol, 5%). The reaction solution was concentrated under vacuum and the residue was purified by gel permeation chromatography (GPC) using toluene as eluent to give n-octyltriethoxysilane (234 mg, 0.85 mmol, 85%). The 1H, 13C{1H} and 29Si{1H} NMR spectra of the isolated compounds were in agreement with the data reported in the literature. Similar methods were applied to the hydrogenosilylation of other silanes with 1,3-dienes/olefins/alkynes, except for the reactions, which were carried out at room temperature (Table 2, entries 2-3). The 1H/13C NMR spectral data of the new compounds are detailed in the Supplementary Material.

in vivo

References

[1] Journal of Organometallic Chemistry, 2016, vol. 809, p. 57 - 62

Triethoxyoctylsilane(2943-75-1)Related Product Information

• 3-Mercaptopropyltriethoxysilane
• Tetramethyl orthosilicate
• Triethoxyisobutylsilane
• Methyltriethoxysilane
• Triethoxyvinylsilane
• Vinyltrimethoxysilane
• 3-Chloropropyltrimethoxysilane
• Triethoxypropylsilane
• Triethoxysilane
• Trimethoxysilane
• N-OCTADECYLTRIETHOXYSILANE
• Trimethoxysilylpropanethiol
• Methyltrimethoxysilane
• Trimethoxypropylsilane
• TRIACONTYLDIMETHYLCHLOROSILANE
• Trimethoxyoctylsilane
• Ethyl silicate
• N-(3-(Trimethoxysilyl)propyl)butylamine