Methyltriethoxysilane Chemical Properties

Melting point:

<-40°C

Boiling point:

141-143 °C(lit.)

Density 

0.895 g/mL at 25 °C(lit.)

vapor density 

>1 (vs air)

vapor pressure 

11 mm Hg ( 20 °C)

refractive index 

n20/D 1.383(lit.)

Flash point:

75 °F

storage temp. 

Store at <= 20°C.

form 

liquid

Specific Gravity

0.896

color 

colorless

Water Solubility 

INSOLUBLE

Hydrolytic Sensitivity

7: reacts slowly with moisture/water

Sensitive 

Moisture Sensitive

BRN 

1742453

Dielectric constant

3.8500000000000001

Stability:

Moisture-sensitive. Flammable - note low flash point. Incompatible with acids, oxidizing agents, moisture, water.

InChIKey

CPUDPFPXCZDNGI-UHFFFAOYSA-N

LogP

-2.4-2.2

CAS DataBase Reference

2031-67-6(CAS DataBase Reference)

NIST Chemistry Reference

Silane, triethoxymethyl-(2031-67-6)

EPA Substance Registry System

Triethoxymethylsilane (2031-67-6)

Safety Information

Risk Statements 

10

Safety Statements 

16

RIDADR 

UN 1993 3/PG 3

WGK Germany 

3

RTECS 

VV4640000

F 

10-21

Autoignition Temperature

220 °C

TSCA 

Yes

HazardClass 

3

PackingGroup 

III

HS Code 

29310095

Toxicity

LD50 orally in Rabbit: 15700 mg/kg

MSDS

• Language:English Provider:Methyltriethoxysilane
• Language:English Provider:ACROS
• Language:English Provider:SigmaAldrich
• Language:English Provider:ALFA

Methyltriethoxysilane Usage And Synthesis

Description

Methyltriethoxysilane is an alkylalkoxysilane. It is a clear, colorless liquid with an odor characteristic of alcohols. It hydrolyzes slowly in the presence of moisture to form reactive silanols. These react further to produce oligosiloxanes and then polysiloxanes.
As a Filler Modifier, Methyltrimethoxysilane is used mainly to render a wide range of surfaces and materials water repellent (e.g. mineral fillers, pigments, glass, cardboard). It may be used pure or in solution to treat fillers, using suitable mixing equipment. It may be necessary to first pre-treat the substrate with water and/or a catalyst. It is also used in the production of silicone resins and condensation-curing silicone rubber, used as an important component in sol-gel systems.
As one of the most common Alkoxy Crosslinkers, Methyltrimethoxysilane has high reactivity that precedes by nucleophilic substitution usually in the presence of acid or base catalysts.

Chemical Properties

Colorless clear liquid

Uses

Methyltriethoxysilane is used in production of silicone polymers or silicone resin. It is used in non-metal surface treatment, non-aqueous polymer preparation, manufacture of semi-conductors, coatings and sealants. It finds application as cross linking agent and an adhesion promoter.

Flammability and Explosibility

Flammable

Methyltriethoxysilane(2031-67-6)Related Product Information

• 3-Aminopropyltriethoxysilane
• Methyltrimethoxysilane
• Triethoxyvinylsilane
• Methyltriacetoxysilane
• Trimethoxypropylsilane
• Dimethyldimethoxysilane
• 3-Chloropropyltrimethoxysilane
• 3-Chloropropyltriethoxysilane
• Triethoxysilane
• Tetraethyl orthosilicate
• Phenyltriethoxysilane
• Tetramethyl orthosilicate
• 3-Glycidoxypropyltrimethoxysilane
• SILANE COUPLING AGENT
• Methyltris(methylethylketoxime)silane
• Chloromethyltriethoxysilane
• Tri(isopropoxy)vinylsilane
• Triethoxypropylsilane