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Methyltrimethoxysilane

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Methyltrimethoxysilane Basic information

Product Name:
Methyltrimethoxysilane
CAS:
1185-55-3
MF:
C4H12O3Si
MW:
136.22
EINECS:
214-685-0
Mol File:
1185-55-3.mol
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Methyltrimethoxysilane Chemical Properties

Melting point:
<-70°C
Boiling point:
102-104 °C(lit.)
Density 
0.955 g/mL at 25 °C(lit.)
vapor pressure 
2990 hPa (20 °C)
refractive index 
n20/D 1.371(lit.)
Flash point:
52 °F
storage temp. 
2-8°C
form 
liquid
color 
colorless
Specific Gravity
0.955
Water Solubility 
decomposes
Sensitive 
Moisture Sensitive
Hydrolytic Sensitivity
7: reacts slowly with moisture/water
BRN 
1736151
Stability:
Stable, but moisture sensitive. Highly flammable. Incompatible with water, strong acids, strong oxidizing agents.
InChIKey
BFXIKLCIZHOAAZ-UHFFFAOYSA-N
CAS DataBase Reference
1185-55-3(CAS DataBase Reference)
NIST Chemistry Reference
Silane, trimethoxymethyl-(1185-55-3)
EPA Substance Registry System
Trimethoxymethylsilane (1185-55-3)
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Safety Information

Hazard Codes 
F,Xi
Risk Statements 
11-43
Safety Statements 
16-24
RIDADR 
UN 1993 3/PG 2
WGK Germany 
3
RTECS 
VV4650000
Autoignition Temperature
225 °C
TSCA 
Yes
HazardClass 
3
PackingGroup 
II
HS Code 
29310095
Toxicity
LD50 orally in Rabbit: 11808 mg/kg LD50 dermal Rabbit > 9600 mg/kg

MSDS

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Methyltrimethoxysilane Usage And Synthesis

Application

Methyltrimethoxysilane is highly miscible with standard organic solvents, such as alcohols, hydrocarbons and acetone. It is practically insoluble in neutral water and reacts only slowly to form silanols and higher condensation products. Addition of a hydrolytic catalyst (inorganic/organic acids, ammonia or amines) accelerates the hydrolysis of Methyltrimethoxysilane substantially.
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.

Description

Trimethoxy (methyl) silane is an organosilicon compound. It can be used as a crosslinker in the preparation of polysiloxane polymers. It can also be used as an acid scavenge used in the formation of substituted azulenes from allenylsilanes and tropyl?ium tetrafluoroborate. It can also be used as the precursor for synthesis of flexible silica aerogels.

Chemical Properties

Colorless clear liquid

Uses

Methyltrimethoxysilane(MTMS) in combination with iron nitrate altered the pore structure dramatically. As the Crosslinking agent of RTV silicone rubber and glass fiber surface treatment agent and talk to agents outside of reinforced plastic laminated products in order to improve the mechanical strength, heat resistance, moisture resistance. Methyltrimethoxysilane is used as an acid scavenger, for example in the formation of substituted azulenes from allenylsilanes and tropyl-ium tetrafluoroborate.

Purification Methods

Methyl trimethoxysilane [1185-55-3] M 136.2, b 102o/760mm, d 4 1.3687, n D 1.3711. Likely impurities are 1,3-dimethyltetramethoxy disiloxane (b 31o/1mm) and cyclic polysiloxanes, see methyl triethoxysilane. [Tamborski & Post J Org Chem 16 1400 1952, Seyferth & Rochow J Org Chem 20 250 1955, Beilstein 4 IV 4203.]

References

https://en.wikipedia.org/wiki/Methyltrimethoxysilane https://www.alfa.com/zh-cn/catalog/B23594/
Rao, A. V., et al. "Synthesis of flexible silica aerogels using methyltrimethoxysilane (MTMS) precursor." Journal of Colloid & Interface Science 300.1(2006):279-85.
Bhagat, Sharad D., et al. "Methyltrimethoxysilane based monolithic silica aerogels via ambient pressure drying." Microporous & Mesoporous Materials 100.1–3(2007):350-355.

Methyltrimethoxysilane Preparation Products And Raw materials

Preparation Products

Raw materials

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MethyltrimethoxysilaneSupplierMore

Shandong Wanda Organosilicon New Materials Co., Ltd. Gold
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021-54177116
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Guangdong wengjiang Chemical Reagent Co., Ltd. Gold
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0751-2886750-
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3001264886@qq.com;3001264886@qq.com;
Qufu Chenguang Chemical Co., Ltd Gold
Tel:
0537-4409155
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sales@silanechem.com
Kangdi chemical (Hubei) Co., Ltd Gold
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Email:
3127859172@qq.com
Hubei shengdali Chemical Co., Ltd Gold
Tel:
027-83629626-
Email:
1541018161@qq.com
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