| Identification | More | [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 | Back Directory | [Appearance]
Colorless clear liquid | [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.)
| [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 | [Hydrolytic Sensitivity]
7: reacts slowly with moisture/water | [Sensitive ]
Moisture Sensitive | [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 | Back Directory | [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 | Back Directory | [Raw materials]
Methyltrichlorosilane-->1,3,5-TRIMETHYLPENTAMETHOXYTRISILOXANE, 95%-->1,1,3,5,7,7-hexamethoxy-1,3,5,7-tetramethyl-tetrasiloxane-->1,3-DIMETHYLTETRAMETHOXYDISILOXANE | [Preparation Products]
Dimethoxymethylphenylsilane-->Tetramethyl orthosilicate |
| Questions and Answers (Q&A) | Back Directory | [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.
|
| Hazard Information | Back Directory | [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. | [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. | [Preparation]
Methyltrimethoxysilane is usually prepared from methyltrichlorosilane and methanol:
CH3SiCl3 + 3 CH3OH → CH3Si(OCH3)3 + 3 HCl | [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. | [Flammability and Explosibility]
Flammable | [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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