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1185-55-3

Supplier Related Products Identification Chemical Properties Safety Data Raw materials And Preparation Products Material Safety Data Sheet(MSDS) Questions and Answers (Q&A) Questions And Answer Hazard Information Spectrum Detail Well-known Reagent Company Product Information

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Identification

Name
Trimethoxy(methyl)silane
CAS
1185-55-3
Synonyms
METHYLTRIMETHOXYSILANE
TRIMETHOXYMETHYLSILANE
CM9100
Dynasylan MTMS
methyltrimethoxy-silan
Methyl-trithoxysilicane
Silane, methyltrimethoxy-
silanea-163
trimethoxymethyl-silan
Union carbide a-163
unioncarbidea-163
Z 6070
TRIMETHOXYMETHYLSILANE, 98+%, DEPOSITIO&
Trimethoxymethylsilane=MTMS
Methyltrimethoxysilane,min.95%
Silane, trimethoxymethyl-
dow corning product z-6070
METHYLTRIMETHOXYLSILANE
Metyltrimethoxysilane
Methyltrimethoxysilane, 97+%
EINECS(EC#)
214-685-0
Molecular Formula
C4H12O3Si
MDL Number
MFCD00008342
Molecular Weight
136.22
MOL File
1185-55-3.mol

Chemical Properties

Appearance
Colorless clear liquid
Melting point 
<-70°C
mp 
<-70°C
Boiling point 
102-104 °C(lit.)

bp 
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.)

Fp 
52 °F

storage temp. 
2-8°C

form 
liquid
color 
colorless
Specific Gravity
0.955
Stability:
Stable, but moisture sensitive. Highly flammable. Incompatible with water, strong acids, strong oxidizing agents.
Water Solubility 
decomposes
Sensitive 
Moisture Sensitive
Hydrolytic Sensitivity
7: reacts slowly with moisture/water
BRN 
1736151
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
1185-55-3(EPA Substance)

Safety Data

Hazard Codes 
F
Risk Statements 
R11:Highly Flammable.
Safety Statements 
S16:Keep away from sources of ignition-No smoking .
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

Raw materials And Preparation Products

Raw materials
Methyltrichlorosilane
Preparation Products
Dimethoxymethylphenylsilane

Material Safety Data Sheet(MSDS)

Questions and Answers (Q&A)

Description
Methyltrimethoxysilane, an important component in sol-gel system. It is a colorless liquid. It hydrolyzes slowly in the presence of moisture (methanol is released) to form reactive silanols. These react further to produce oligosiloxanes and then poly- siloxanes. 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.
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.

Questions And Answer

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.

Hazard Information

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.
General Description
Trimethoxymethylsilane (MTM) is an organosilicon compound widely used as a precursor for the preparation of silica-based materials, which finds the applications in various fields. Particularly in molecular assembly, linking nano building blocks, and selective synthesis oligosiloxane compounds. It can also be utilized as a crosslinker in the synthesis of polysiloxane polymers.

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.]

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