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.
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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:?
F
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
7. Synthesis Route
1185-55-3Total: 16 Synthesis Route
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. - View all
- 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==
11. Question & Answer
-
Methyltrimethoxysilane is a colorless and transparent liquid that is highly miscible with organic solvents such as alcohols, hydrocarbons, and acetone, but incompatible with water, strong acids, and s..
-
Title: How Can the Production Capacity of Methyltrimethoxysilane in China be Improved? Article: With the rapid growth of the silicone industry in China, the demand for silicone rubber and silicone res..
-
Background Technology The current manufacturing method of organosilicon oxy-based silane involves the use of solvents as auxiliary reactants, which is one of the main causes of pollution. Although the..
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