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1185-55-3

Basic Information
CAS No.: 1185-55-3
Name: Methyltrimethoxysilane
Article Data: 43
Molecular Structure:
Molecular Structure of 1185-55-3 (Methyltrimethoxysilane)
Formula: C4H12O3Si
Molecular Weight: 136.223
Synonyms: (Trimethoxysilyl)methane;Silane,trimethoxymethyl-;Dynasylan MTMS;Glasca B;Methylsilicon trimethoxide (MeSi(OMe)3);NUCSilicone A 163;Silquest A 163;Silquest A 1630;Trimethoxymethylsilane;Methyltrimethoxysilane, Trimethoxy methyl silane;
EINECS: 214-685-0
Density: 0.911 g/cm3
Melting Point: <-70 ºC
Boiling Point: 102.5 ºC at 760 mmHg
Flash Point: 11.1 ºC
Solubility: decomposes in water
Appearance: colourless liquid
Hazard Symbols: FlammableF
Risk Codes: 11
Safety: 16
Transport Information: UN 1993 3/PG 2
PSA: 27.69000
LogP: 0.49430
Synthetic route
75-79-6

Methyltrichlorosilane

1185-55-3

Methyltrimethoxysilan

Conditions
ConditionsYield
With C6H5N(CH3)2; CH3OH reaction in presence of Dimethylphenyl amine:;90%
With methanol; N,N-dimethyl-aniline reaction in presence of Dimethylphenyl amine:;90%
With C5H5N; CH3OH reaction in presence of pyridine;;
75-54-7

Dichloromethylsilane

67-56-1

methanol

1185-55-3

Methyltrimethoxysilan

Conditions
ConditionsYield
at 35℃; for 7h; Temperature; Inert atmosphere; Large scale;80.2%
75-79-6

Methyltrichlorosilane

1016-09-7

benzhydryl methyl ether

1185-55-3

Methyltrimethoxysilan

Conditions
ConditionsYield
bismuth(III) chloride at 25℃; for 15h; Inert atmosphere;59%
5926-26-1

(chloromethyl)trimethoxysilane

A

1185-55-3

Methyltrimethoxysilan

B

17861-41-5

1,1,3,3,5,5-hexamethoxy-1,3,5-trisilacyclohexane

C

C12H32O8Si4

Conditions
ConditionsYield
With magnesium In tetrahydrofuran at -20 - 0℃;A 0.5%
B 45%
C 20%
109-87-5

Dimethoxymethane

71520-43-9

tris(ethylthio)methylsilane

A

1185-55-3

Methyltrimethoxysilan

B

77454-95-6

(ethylthio)methoxymethane

Conditions
ConditionsYield
With zinc(II) chloride In toluene at 0℃; for 5h; Product distribution; other temperature;A 4%
B 10%
With zinc(II) chloride In toluene at 0℃; for 5h;A 4%
B 10%
75-79-6

Methyltrichlorosilane

A

1185-55-3

Methyltrimethoxysilan

B

18186-97-5

1,3-dimethyltetramethoxydisiloxane

C

17866-12-5

1,1,3,5,5-pentamethoxy-1,3,5-trimethyl-trisiloxane

D

17988-15-7

1,1,3,5,7,7-hexamethoxy-1,3,5,7-tetramethyl-tetrasiloxane

Conditions
ConditionsYield
With CH3OHA n/a
B n/a
C 9.6%
D 5.6%
With CH3OHA n/a
B n/a
C 9.6%
D 5.6%
67-56-1

methanol

75-79-6

Methyltrichlorosilane

1185-55-3

Methyltrimethoxysilan

75-79-6

Methyltrichlorosilane

124-41-4

sodium methylate

1185-55-3

Methyltrimethoxysilan

18107-32-9

1,1,2,2-tetramethoxy-1,2-dimethyl-disilane

1185-55-3

Methyltrimethoxysilan

Conditions
ConditionsYield
(basic elimination);
1825-61-2

Methoxytrimethylsilane

373-74-0

methyltrifluorosilane

271772-12-4

methylfluorodimethoxysilane

271772-13-5

methyldifluoromethoxysilane

A

420-56-4

trimethylsilyl fluoride

B

1185-55-3

Methyltrimethoxysilan

Conditions
ConditionsYield
at 120℃; Equilibrium constant;
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    Product Name: Methyltrimethoxysilane CAS: 1185-55-3 MF: C4H12O3Si MW: 136.22 EINECS: 214-685-0 Mol File: 1185-55-3.mol Methyltrimethoxysilane Structure Methyltrimethoxysilane Chemical Properties Melting point <-70°C Boi

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Consensus Reports

Reported in EPA TSCA Inventory.

Specification

The Methyltrimethoxysilane, with the CAS registry number 1185-55-3, is also known as Trimethoxy(methyl)silane. It belongs to the product categories of Organosilicon;Self Assembly &;Silane Coupling Agents/Adhesion Promoters.This chemical's molecular formula is C4H12O3Si and molecular weight is 136.22.Its EINECS number is 214-685-0. What's more,Its systematic name is Trimethoxy(methyl)silane.It is a colorless clear liquid.And it is stable,but moisture sensitive, highly flammable,incompatible with water, strong acids, strong oxidizing agents.It is highly Flammable,when you use it ,keep away from sources of ignition-No smoking.

Physical properties about Methyltrimethoxysilane are:
(1)ACD/LogP: 1.653; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): 1.65; (4)ACD/LogD (pH 7.4): 1.65; (5)ACD/BCF (pH 5.5): 10.62; (6)ACD/BCF (pH 7.4): 10.62; (7)ACD/KOC (pH 5.5): 188.84; (8)ACD/KOC (pH 7.4): 188.84; (9)#H bond acceptors: 3; (10)#H bond donors: 0; (11)#Freely Rotating Bonds: 3; (12)Index of Refraction: 1.379; (13)Molar Refractivity: 34.533 cm3; (14)Molar Volume: 149.386 cm3; (15)Surface Tension: 18.4139995574951 dyne/cm; (16)Density: 0.912 g/cm3; (17)Flash Point: 11.111 °C; (18)Enthalpy of Vaporization: 32.75 kJ/mol; (19)Boiling Point: 102.499 °C at 760 mmHg; (20)Vapour Pressure: 38.8209991455078 mmHg at 25°C.

You can still convert the following datas into molecular structure:
(1)(1)SMILES:O(C)[Si](OC)(OC)C;
(2)Std. InChI:InChI=1S/C4H12O3Si/c1-5-8(4,6-2)7-3/h1-4H3;
(3)Std. InChIKey:BFXIKLCIZHOAAZ-UHFFFAOYSA-N.

The toxicity data of Methyltrimethoxysilane as follows:

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,