Skip to Content
Merck
CN

Key Documents

View All Documentation

8.00658

Tetraethyl orthosilicate

for synthesis

Synonym(s):

Tetraethyl orthosilicate, Tetraethoxysilane

Sign In to View Organizational & Contract Pricing.

Select a Size

Change View

About This Item

Linear Formula:
(C2H5O)4Si
CAS Number:
78-10-4
Molecular Weight:
208.33
UNSPSC Code:
12352103
EC Index Number:
201-083-8
NACRES:
NA.22
MDL number:
MFCD00009062
Assay:
≥99% (GC)
Grade:
synthesis grade
Bp:
168.0 °C/1013 hPa
Vapor pressure:
2 hPa ( 20 °C)
Technical Service
Need help? Our team of experienced scientists is here for you.
Let Us Assist

grade

synthesis grade

Quality Segment

200

vapor pressure

2 hPa ( 20 °C)

assay

≥99% (GC)

form

liquid

autoignition temp.

230 °C

potency

6270 mg/kg LD50, oral (Rat), 5860 mg/kg LD50, skin (Rabbit)

expl. lim.

1.3-23 % (v/v)

dilution

(for synthesis)

pH

7 (20 °C)

bp

168.0 °C/1013 hPa

mp

-85.5 °C

transition temp

flash point 45 °C

density

0.94 g/cm3 at 20 °C

storage temp.

2-30°C

SMILES string

[Si](OCC)(OCC)(OCC)OCC

InChI

1S/C8H20O4Si/c1-5-9-13(10-6-2,11-7-3)12-8-4/h5-8H2,1-4H3

InChI key

BOTDANWDWHJENH-UHFFFAOYSA-N

General description

Tetraethylorthosilicate (TEOS) is the ethyl ester of ortho silicic acid, which is the most readily available silicon source. It is mainly used as a crosslinking agent in silicon polymer and precursor in the preparation of silicon thin films.

Application

  • Effects of Tetraethyl Orthosilicate (TEOS) on the Light and Temperature Stability of a Pigment from Beta vulgaris and Its Potential Food Industry Applications: This study explores how TEOS can enhance the stability of natural pigments from beets, suggesting potential for improved food colorants (GA Molina et al., 2014).
  • Characterization of Chemical Vapor Deposited Tetraethyl Orthosilicate based SiO2 Films for Photonic Devices: The study details the use of TEOS in the production of silicon dioxide films for enhanced photonic device performance (J Kotcharlakota et al., 2016).
  • Comprehensive performances of carbon nanotube reinforced foam concrete with tetraethyl orthosilicate impregnation: Research indicates significant enhancements in the structural properties of foam concrete, essential for building technology (J Luo et al., 2017).
  • Mesoporous bis (trimethoxysilyl) hexane (BTMSH)/tetraethyl orthosilicate (TEOS)-based hybrid silica aerogel membranes for CO2 capture: Highlights the development of innovative aerogel membranes for effective CO2 capture, contributing to environmental management strategies (YF Lin et al., 2016).

Features and Benefits

TEOScan polymerize in alkaline, acidic, and neutral conditions, making it anadvantageous precursor

Analysis Note

Assay (GC, area%): ≥ 99.0 % (a/a)
Density (d 20 °C/ 4 °C): 0.932 - 0.934
Identity (IR): passes test

Still not finding the right product?

Explore all of our products under Tetraethyl orthosilicate

pictograms

FlameExclamation mark
GHS02,GHS07

signalword

Warning

Hazard Classifications

Acute Tox. 4 Inhalation - Eye Irrit. 2 - Flam. Liq. 3 - STOT SE 3

target_organs

Respiratory system

Storage Class

3 - Flammable liquids

wgk

WGK 1

flash_point_f

113.0 °F - closed cup

flash_point_c

45 °C - closed cup

Choose from one of the most recent versions:

Certificates of Analysis (COA)

Lot/Batch Number

Don't see the Right Version?

If you require a particular version, you can look up a specific certificate by the Lot or Batch number.

Search for a COA

Already Own This Product?

Find documentation for the products that you have recently purchased in the Document Library.

Visit the Document Library