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Methyltriethoxysilane
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Name

Methyltriethoxysilane

 EINECS 217-983-9
CAS No. 2031-67-6 Density 0.896 g/cm3
PSA 27.69000 LogP 1.66460
Solubility insoluble in water Melting Point <-40°C
Formula C7H18O3Si Boiling Point 144.5 °C at 760 mmHg
Molecular Weight 178.304 Flash Point 23.9 °C
Transport Information UN 1993 3/PG 3 Appearance Colorless clear liquid
Safety 16 Risk Codes 10
Molecular Structure Molecular Structure of 2031-67-6 (Methyltriethoxysilane) Hazard Symbols R10:;
Synonyms

A162;Dynasylan MIES;ICI-EP 5850;KBE 13LS1890;LS1890;MTES;Methaneorthosiliconic acid, triethyl ester;Monomethyltriethoxysilane;ND 27;NSC 5226;SIM 6555.0;SZ 6072;SZ 6383;Silquest A 162;TSL 8123;Triethoxymethylsilane;Triethoxysilylmethane;

Article Data 62

Methyltriethoxysilane Synthetic route

75-79-6

Methyltrichlorosilane

141-52-6

sodium ethanolate

2031-67-6

Methyltriethoxysilan

Conditions
ConditionsYield
In ethanol for 3h;99%
75-79-6

Methyltrichlorosilane

64-17-5

ethanol

2031-67-6

Methyltriethoxysilan

Conditions
ConditionsYield
With polyaniline at 50 - 55℃; for 5h;98.3%
2031-62-1

diethoxymethylane

A

992-94-9

methylsilane

B

2031-67-6

Methyltriethoxysilan

Conditions
ConditionsYield
dimethyltitanocene at 50℃; for 0.5h;A 87%
B 96%
dimethyltitanocene at 50℃; for 0.5h; various silanes, other amount if dimethyltitanocene, with solvent, other time and temp.;A 87%
B 96%
With sodium t-butanolate In toluene at 20℃; Inert atmosphere;
With sodium t-butanolate In tetrahydrofuran-d8 at 20℃; for 0.166667h; Sealed tube; Inert atmosphere;
71520-43-9

tris(ethylthio)methylsilane

122-51-0

orthoformic acid triethyl ester

A

6267-24-9

tris(ethylsulfanyl)methane

B

2031-67-6

Methyltriethoxysilan

Conditions
ConditionsYield
With zinc(II) chloride In toluene at 0℃; for 5h;A 90%
B 88%
75-79-6

Methyltrichlorosilane

78-10-4

tetraethoxy orthosilicate

A

1825-75-8

ethoxy(methyl)dichlorosilane

B

18157-20-5

chloro(diethoxy)(methyl)silane

C

2031-67-6

Methyltriethoxysilan

Conditions
ConditionsYield
at 20 - 22℃; for 150h;A 12%
B 80%
C 6.5%
18055-95-3

penta-Si-ethoxy-Si-methyl-Si,Si'-methanediyl-bis-silane

2031-67-6

Methyltriethoxysilan

Conditions
ConditionsYield
With potassium hydroxide In ethanol Heating;70%
2031-62-1

diethoxymethylane

5507-44-8

methylvinyldiethoxysilane

A

2031-67-6

Methyltriethoxysilan

B

18043-74-8

1,2-bis(diethoxymethylsilyl)ethane

Conditions
ConditionsYield
[RuCl(NCCH3)5][RuCl4(NCCH3)2] at 100℃; for 2h;A 12 % Chromat.
B 55%
78-10-4

tetraethoxy orthosilicate

[MnMe(μ-Me)(1,3-bis(2,4,6-trimethylphenyl)imidazole-2-ylidene)]2

2031-67-6

Methyltriethoxysilan

Conditions
ConditionsYield
In benzene at 100℃; for 30h; Inert atmosphere;47%
78-10-4

tetraethoxy orthosilicate

[MnMe(μ-Me)(1,3-diisopropyl-4,5-dimethylimidazole-2-ylidene)]2

2031-67-6

Methyltriethoxysilan

Conditions
ConditionsYield
In benzene at 80℃; for 60h; Inert atmosphere; Schlenk technique;43%
71520-43-9

tris(ethylthio)methylsilane

5783-79-9

2-Ethoxy-5,5-dimethyl-1,3-dioxane

A

6267-24-9

tris(ethylsulfanyl)methane

B

2031-67-6

Methyltriethoxysilan

C

2-ethoxy-2,5,5-trimethyl-1,2-dioxa-2-silacyclohexane

Conditions
ConditionsYield
With hydrogenchloride In toluene at 40℃; for 8h;A 41%
B 20%
C 40%

Methyltriethoxysilane Chemical Properties

IUPAC Name: triethoxy(methyl)silane 
Empirical Formula: C7H18O3Si
Molecular Weight: 178.3015 
EINECS: 217-983-9 
Structure of Silane,triethoxymethyl- (CAS NO.2031-67-6):

Index of Refraction: 1.401
Molar Refractivity: 48.43 cm3
Molar Volume: 198.9 cm3
Polarizability: 19.19×10-24cm3
Surface Tension: 21.5 dyne/cm
Density: 0.896 g/cm3
Flash Point: 23.9 °C
Enthalpy of Vaporization: 36.59 kJ/mol 
Melting Point: <-40°C
Boiling Point: 144.5 °C at 760 mmHg
Vapour Pressure: 6.38 mmHg at 25°C 
Storage temp: Flammables area
Water Solubility: INSOLUBLE
Sensitive: Moisture Sensitive 
Physical Appearance: Colorless clear liquid
Stability: Stability Moisture-sensitive. Flammable - note low flash point. Incompatible with acids, oxidizing agents, moisture, water. 
Product Categories: Silicone series;Functional Materials;Si (Classes of Silicon Compounds);Silane Coupling Agents;Silane Coupling Agents (Intermediates);Si-O Compounds;Trialkoxysilanes;Alkoxy Silanes;Crosslinkers;Crosslinking Agents;Silane series 
Canonical SMILES: CCO[Si](C)(OCC)OCC
InChI: InChI=1S/C7H18O3Si/c1-5-8-11(4,9-6-2)10-7-3/h5-7H2,1-4H3
InChIKey: CPUDPFPXCZDNGI-UHFFFAOYSA-N
Synonyms of Silane,triethoxymethyl- (CAS NO.2031-67-6): 4-04-00-04204 (Beilstein Handbook Reference) ; Methaneorthosiliconic acid, triethyl ester ; Methyl triethoxysilane ; Methyltriethoxysilane ; NSC 5226 ; Silane, methyltriethoxy- ; Triethoxymethylsilane ; Triethoxysilylmethane  

Methyltriethoxysilane Toxicity Data With Reference

1.    

skn-rbt 500 mg/24H MLD

     28ZPAK    Sbornik Vysledku Toxixologickeho Vysetreni Latek A Pripravku Marhold, J.V.,Institut Pro Vychovu Vedoucicn Pracovniku Chemickeho Prumyclu Praha,Czechoslovakia.: 1972,219.
2.    

eye-rbt 89 mg

     JIHTAB    Journal of Industrial Hygiene and Toxicology. 30 (1948),332.
3.    

eye-rbt 500 mg/24H MLD

     28ZPAK    Sbornik Vysledku Toxixologickeho Vysetreni Latek A Pripravku Marhold, J.V.,Institut Pro Vychovu Vedoucicn Pracovniku Chemickeho Prumyclu Praha,Czechoslovakia.: 1972,219.
4.    

orl-rat LDLo:15,700 mg/kg

     28ZPAK    Sbornik Vysledku Toxixologickeho Vysetreni Latek A Pripravku Marhold, J.V.,Institut Pro Vychovu Vedoucicn Pracovniku Chemickeho Prumyclu Praha,Czechoslovakia.: 1972,219.
5.    

ihl-rat LCLo:4000 ppm/8H

     JIHTAB    Journal of Industrial Hygiene and Toxicology. 30 (1948),332.

Methyltriethoxysilane Consensus Reports

Reported in EPA TSCA Inventory.

Methyltriethoxysilane Safety Profile

Mildly toxic by ingestion and inhalation. A skin and eye irritant. When heated to decomposition it emits acrid smoke and irritating fumes.
The Risk Statements information of Silane,triethoxymethyl- (CAS NO.2031-67-6):
10:  Flammable 
The Safety Statements information of Silane,triethoxymethyl- (CAS NO.2031-67-6):
16:  Keep away from sources of ignition - No smoking 
RIDADR:UN 1993 3/PG 3
WGK Germany:3
RTECS:VV4640000
F:10-21
TSCA:Yes
HazardClass:3

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