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341436

Tetramethyl orthosilicate

≥99%

Synonym(s):

Tetramethoxysilane

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About This Item

Linear Formula:

Si(OCH₃)₄

CAS Number:

Molecular Weight:

152.22

UNSPSC Code:

12352103

NACRES:

NA.23

PubChem Substance ID:

EC Number:

211-656-4

Beilstein/REAXYS Number:

1699658

MDL number:

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Properties

vapor density

5.25 (vs air)

vapor pressure

13 hPa ( 20 °C)

assay

≥99%

form

liquid

refractive index

n20/D 1.368 (lit.)

bp

121-122 °C (lit.)

mp

−4 °C (lit.)

density

1.023 g/mL at 25 °C (lit.)

SMILES string

CO[Si](OC)(OC)OC

InChI

1S/C4H12O4Si/c1-5-9(6-2,7-3)8-4/h1-4H3

InChI key

LFQCEHFDDXELDD-UHFFFAOYSA-N

Description

General description

Tetramethyl orthosilicate is a colorless organosilicon compound consisting of four methoxy groups bonded to a silicon atom. On hydrolysis, it produces silicon dioxide and methanol. It has been widely used in catalysis, synthesis of nanomaterials, ceramics, zeolites, and coating materials.

Application

Tetramethyl orthosilicate can be used:

As a precursor to synthesize organic-inorganic coating materials by sol-gel processing method.
As an efficient reagent for direct amidation of aliphatic and aromatic carboxylic acids with amines and anilines.
As a precursor to fabricate SiO₂ nanocomposite films by chemical vapor deposition(CVD) method.
As a selective catalyst ofC3-methylation of indole.

Used in the sol-gel synthesis of chromium-doped silicates and in the formation of hexagonal mesoporous silica layers.

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pictograms

Flame

Skull and crossbones

Corrosion

GHS02,GHS06,GHS05

signalword

Danger

hcodes

H226,H315,H318,H330

pcodes

P210 - P233 - P280 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338

Hazard Classifications

Acute Tox. 1 Inhalation - Eye Dam. 1 - Flam. Liq. 3 - Skin Irrit. 2

Storage Class

3 - Flammable liquids

wgk

WGK 1

flash_point_f

78.8 °F - closed cup

flash_point_c

26 °C - closed cup

ppe

Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter

Regulatory Information

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Articles

Green Synthesis of Nanomaterials

Silica's versatility spans various industries, including biomedical applications.

Sol-Gel Science for Ceramic Materials

Reactive silicone chemistry: Focus on pure silicon production, polymerizations, and controlled stereochemistry reactions.

Synthesis of Melting Gels Using Mono-Substituted and Di-Substituted Alkoxysiloxanes

Synthesis of Melting Gels Using Mono-Substituted and Di-Substituted Alkoxysiloxanes

View All Articles

Fabrication and characteristics of SiOx films by plasma chemical vapor deposition of tetramethylorthosilicate

Mu-Rong Yang, et al.

Surface and Coatings Technology, 123, 204-209 (2000)

Tetramethyl Orthosilicate (TMOS) as a Reagent for Direct Amidation of Carboxylic Acids

D. Christopher Braddock, et al.

Organic Letters, 20, 950-953 (2018)

Tetramethyl orthosilicate as a sharp-selective catalyst of C3-methylation of indole by supercritical methanol

I.V.Kozhevnikov, et al.

Journal of Supercritical Fluids, 69, 82-90 (2012)

View All Related Papers

Global Trade Item Number

SKU	GTIN
341436-25G	04061826754023
341436-100G	04061826754016