Tetramethyl orthosilicate

Basic Information

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CAS Number

681-84-5

Molecular Formula

C4H12O4Si

Molecular Weight

152.22 g/mol

Chemical Classification

Basic Chemical Raw Materials Organic Chemicals Hydrocarbons

Basic Physical Properties

Melting Point

-2 ºC

Boiling Point

122°C

Density

1.023

Flash Point

26 ºC

Solubility

Miscible with ethanol and organic solvents. Immiscible with water.

Refractive Index

1.367-1.37

Vapor Pressure

3.35 psi ( 20 °C)

SMILES

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CO[Si](OC)(OC)OC

InChI

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

InChIKey

LFQCEHFDDXELDD-UHFFFAOYSA-N

LogP

0.007599999999999829

Topological Polar Surface Area

36.92 Å²

Hydrogen Bond Donor/Acceptor

0 / 4

Complexity

55.5

Safety Information

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GHS Hazard Pictograms

H226

H315

H318

H330

H335

Hazard Statement

H226 Flammable liquid and vapor
Flammable liquids

H315 Causes skin irritation
Skin corrosion/irritation

H318 Causes serious eye damage
Serious eye damage/eye irritation

H330 Fatal if inhaled
Acute toxicity, inhalation

H335 May cause respiratory irritation
Specific target organ toxicity, single exposure; Respiratory tract irritation

Hazard Class

Class 6.1 Class 6.1

Sensitiveness

Moisture Sensitive

Explosive Limit

0.88-23.8%(V)

Synonyms & References

English

Tetramethyl orthosilicate
Tetramethoxysilanecolorlessliq
Methyl silicate
DYNASIL M
Tetramethoxysilane
Silicon tetramethoxide
Methyl silicate 51
Tetramethyl silicate
methyl orthosilicate
O-METHYLSILICATE
orthosilicic acid tetramethyl ester
SILICATE,METHYL
Tetraethoxysilane
Tetramethosysilan
tetramethoxy-silan
tetramethoxy-silane
tl190
TMOS

MDL Number

MFCD00008341

Customs Code

29209085

FAQ

What is Tetramethyl orthosilicate (CAS: 681-84-5)?

Tetramethyl orthosilicate (CAS: 681-84-5) is a colorless liquid that is the organometallic compound of silicon and methyl groups. It is widely used as a precursor for forming silica coatings and in the production of silicon-based materials.

What are the main uses of Tetramethyl orthosilicate (CAS: 681-84-5)?

Tetramethyl orthosilicate (CAS: 681-84-5) is primarily used in the production of silica gels, coatings, and inorganic polymers. It is also utilized in the semiconductor industry for chemical vapor deposition and in the manufacture of high-refractive-index optical coatings.

Is Tetramethyl orthosilicate (CAS: 681-84-5) safe?

Tetramethyl orthosilicate (CAS: 681-84-5) is generally safe when handled with proper protective measures. However, it can cause irritation to the eyes and skin. It is important to avoid inhalation and to use appropriate personal protective equipment such as gloves and goggles.

How should Tetramethyl orthosilicate (CAS: 681-84-5) be stored?

Tetramethyl orthosilicate (CAS: 681-84-5) should be stored in a cool, dry place away from direct sunlight. It should be kept in a sealed container to prevent evaporation and contamination. Store it in a well-ventilated area and avoid contact with heat sources and other incompatible materials.