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Methyltrimethoxysilane structure
Methyltrimethoxysilane structure

Methyltrimethoxysilane

Iupac Name:trimethoxy(methyl)silane
CAS No.: 1185-55-3
Molecular Weight:136.22178
Modify Date.: 2022-11-25 02:17
Introduction: 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. View more+
1. Names and Identifiers
1.1 Name
Methyltrimethoxysilane
1.2 Synonyms

CM9100 Dynasylan MTMS EINECS 214-685-0 HD-119 methyltrimethoxy-silan Methyltrimethoxysilane in stock Methyltrimethoxysilane,AcroSeal Methyl-trithoxysilicane Metyltrimethoxysilane MFCD00008342 monomethyl trimethoxy silane MTMS Silane, methyltrimethoxy- Silane, trimethoxymethyl- silanea-163 Trimethoxy(methyl)silane Trimethoxymethylsila trimethoxymethyl-silan Trimethoxymethylsilane Union carbide a-163 unioncarbidea-163 Z 6070

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1.3 CAS No.
1185-55-3
1.4 CID
14456
1.5 EINECS(EC#)
214-685-0
1.6 Molecular Formula
C4H12O3Si (isomer)
1.7 Inchi
InChI=1S/C4H12O3Si/c1-5-8(4,6-2)7-3/h1-4H3
1.8 InChIkey
BFXIKLCIZHOAAZ-UHFFFAOYSA-N
1.9 Canonical Smiles
CO[Si](C)(OC)OC
1.10 Isomers Smiles
CO[Si](C)(OC)OC
2. Properties
2.1 Density
0.955
2.1 Melting point
<-70 oC
2.1 Boiling point
102℃
2.1 Refractive index
1.3695-1.3715
2.1 Flash Point
11℃
2.1 Precise Quality
136.05600
2.1 PSA
27.69000
2.1 logP
0.49430
2.1 Appearance
colourless liquid
2.2 Storage
Moisture Sensitive. Ambient temperatures.
2.3 Chemical Properties
Colorless clear liquid
2.4 Color/Form
colorless
2.5 Water Solubility
Decomposes in water
2.6 Stability
Stable, but moisture sensitive. Highly flammable. Incompatible with water, strong acids, strong oxidizing agents.
2.7 StorageTemp
Store below +30°C.
3. Use and Manufacturing
3.1 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.]
3.2 Usage
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.
4. Safety and Handling
4.1 Symbol
GHS02, GHS07
4.1 Hazard Codes
F
4.1 Signal Word
Danger
4.1 Risk Statements
R11
4.1 Safety Statements
S16
4.1 Packing Group
II
4.1 Hazard Class
3
4.1 Hazard Declaration
H225-H317
4.1 RIDADR
UN 1993
4.1 Caution Statement
P210
4.1 WGK Germany
3
4.1 RTECS
VV4650000
4.1 Report

Reported in EPA TSCA Inventory.

4.2 Safety

Mildly toxic by ingestion. A skin and eye irritant. When heated to decomposition it emits acrid smoke and fumes.
Hazard Codes:?FlammableF
Risk Statements: 11?
R11:Highly flammable.
Safety Statements: 16?
S16:Keep away from sources of ignition.
RIDADR: UN 1993 3/PG 2
WGK Germany: 3
RTECS: VV4650000
HazardClass: 3
PackingGroup of Methyltrimethoxysilane (CAS NO.1185-55-3): II

4.3 Sensitive
Moisture Sensitive
4.4 Specification

? Methyltrimethoxysilane (CAS NO.1185-55-3), its Synonyms are Silane, methyltrimethoxy- ; Silane, trimethoxymethyl- ; Trimethoxymethylsilane ; Union carbide A-163 . It is colorless clear liquid.

4.5 Toxicity

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
rabbit LD skin > 10mL/kg (10mL/kg) ? Union Carbide Data Sheet. Vol. 1/17/1972,
rat LD50 oral 12300uL/kg (12.3mL/kg) ? Union Carbide Data Sheet. Vol. 1/17/1972,

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5. MSDS

2.Hazard identification

2.1 Classification of the substance or mixture

Flammable liquids, Category 2

2.2 GHS label elements, including precautionary statements

Pictogram(s)
Signal word

Danger

Hazard statement(s)

H225 Highly flammable liquid and vapour

Precautionary statement(s)
Prevention

P210 Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.

P233 Keep container tightly closed.

P240 Ground and bond container and receiving equipment.

P241 Use explosion-proof [electrical/ventilating/lighting/...] equipment.

P242 Use non-sparking tools.

P243 Take action to prevent static discharges.

P280 Wear protective gloves/protective clothing/eye protection/face protection.

Response

P303+P361+P353 IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water [or shower].

P370+P378 In case of fire: Use ... to extinguish.

Storage

P403+P235 Store in a well-ventilated place. Keep cool.

Disposal

P501 Dispose of contents/container to ...

2.3 Other hazards which do not result in classification

none

9. Other Information
9.0 Usage
Methyltrimethoxysilane is used as an acid scavenger, for example in the formation of substituted azulenes from allenylsilanes and tropyl-ium tetrafluoroborate.
9.1 BRN
1736151
9.2 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.
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9.3 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.
9.4 Chemical Properties
Colorless clear liquid
9.5 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.
9.6 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.]
9.7 Uses
Methyltrimethoxysilane is a reagent used in they synthesis of electronic materials and organometallic compounds. Used in the coating of carbon-fiber surfaces, as well as in the synthesis of nanocomposites.
9.8 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.
9.9 Production
10,000,000 - 50,000,000 lb
9.10 Manufacturing Info
Adhesive manufacturing|Silane, trimethoxymethyl-: ACTIVE
10. Computational chemical data
  • Molecular Weight: 136.22178g/mol
  • Molecular Formula: C4H12O3Si
  • Compound Is Canonicalized: True
  • XLogP3-AA: null
  • Exact Mass: 136.05557077
  • Monoisotopic Mass: 136.05557077
  • Complexity: 54
  • Rotatable Bond Count: 3
  • Hydrogen Bond Donor Count: 0
  • Hydrogen Bond Acceptor Count: 3
  • Topological Polar Surface Area: 27.7
  • Heavy Atom Count: 8
  • Defined Atom Stereocenter Count: 0
  • Undefined Atom Stereocenter Count: 0
  • Defined Bond Stereocenter Count: 0
  • Undefined Bond Stereocenter Count: 0
  • Isotope Atom Count: 0
  • Covalently-Bonded Unit Count: 1
  • CACTVS Substructure Key Fingerprint: AAADccBgMAgAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAEhAAAEAAAAAAAAJCAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA==
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