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Dodecyltrimethoxysilane
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Name

Dodecyltrimethoxysilane

 EINECS 221-332-4
CAS No. 3069-21-4 Density 0.877 g/cm3
PSA 27.69000 LogP 4.78540
Solubility N/A Melting Point -40 °C
Formula C15H34O3Si Boiling Point 234.9 °C at 760 mmHg
Molecular Weight 290.519 Flash Point 108.6 °C
Transport Information N/A Appearance Colorless to yellowish transparent liquid
Safety 26-36/37/39 Risk Codes 36/37/38
Molecular Structure Molecular Structure of 3069-21-4 (Dodecyltrimethoxysilane) Hazard Symbols R36/38:Irritating to eyes and skin.;
Synonyms

1-(Trimethoxysilyl)dodecane;n-Dodecyltrimethoxysilane;Trimethoxydodecylsilane;

Article Data 6

Dodecyltrimethoxysilane Synthetic route

865-33-8

potassium methanolate

113823-65-7

Trihydroxydodecylsilan

3069-21-4

dodecyltrimethoxysilane

Conditions
ConditionsYield
In hexane at 20℃; for 120h; Etherification;79%
67-56-1

methanol

15890-72-9

laurylmagnesium bromide

3069-21-4

dodecyltrimethoxysilane

Conditions
ConditionsYield
With silicon tetrafluoride In diethyl ether
4484-72-4

n-dodecyltrichlorosilane

3069-21-4

dodecyltrimethoxysilane

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: 83 percent / H2O; NaHCO3 / diethyl ether / 1 h / -10 - 10 °C
2: 79 percent / hexane / 120 h / 20 °C
View Scheme
1634-04-4

tert-butyl methyl ether

4484-72-4

n-dodecyltrichlorosilane

A

[CH3(CH2)11Si(OMe)2]2O

B

3069-21-4

dodecyltrimethoxysilane

Conditions
ConditionsYield
With bismuth(III) chloride at 0 - 20℃; Neat (no solvent); Inert atmosphere;A Ca. 10 %Spectr.
B Ca. 90 %Spectr.
1365801-87-1

1-oxo-1-methyl-4-ethyl-4-hydroxymethyl-2,6-dioxa-1-phosphacyclohexane

3069-21-4

dodecyltrimethoxysilane

dodecyldimethoxy(1-oxo-1-methyl-4-ethyl-1-phospha-2,6-dioxa-cyclohexan-4-ylmethoxy) silane

Conditions
ConditionsYield
In N,N-dimethyl-formamide at 130℃; for 8h; Temperature; Solvent; Inert atmosphere;97.6%
1365801-87-1

1-oxo-1-methyl-4-ethyl-4-hydroxymethyl-2,6-dioxa-1-phosphacyclohexane

3069-21-4

dodecyltrimethoxysilane

dodecyltri(1-oxo-1-methyl-4-ethyl-1-phospha-2,6-dioxacyclohexan-4-ylmethoxy)silane

Conditions
ConditionsYield
With tributyl-amine In 1,1,2,2-tetrachloroethane at 65 - 140℃; for 14h; Concentration; Solvent; Reagent/catalyst; Temperature; Inert atmosphere;96.8%
3069-21-4

dodecyltrimethoxysilane

824-11-3

ethriol phosphite

dodecyltri(1-oxo-1-methyl-4-ethyl-1-phospha-2,6-dioxacyclohexan-4-ylmethoxy)silane

Conditions
ConditionsYield
With dimethyl sulfate In diethylene glycol dimethyl ether at 160℃; for 16h; Solvent; Reagent/catalyst; Temperature; Inert atmosphere;88.6%
3069-21-4

dodecyltrimethoxysilane

872-19-5

n-dodecylsilane

Conditions
ConditionsYield
With N,N,N,N,N,N-hexamethylphosphoric triamide; sodium tetrahydroborate; ethyl bromide; tetraoctyl ammonium bromide In benzene-d6 at 20℃; for 24h;76%
3069-21-4

dodecyltrimethoxysilane

C12H25(2)H3Si

Conditions
ConditionsYield
With N,N,N,N,N,N-hexamethylphosphoric triamide; ethyl bromide; sodium borodeuteride; tetraoctyl ammonium bromide In benzene-d6 at 20℃; for 24h;70%
core-shell fluoroacrylate copolymer latex; monomer(s): butyl acrylate; methyl methacrylate; 2,3,4,5,5,5-hexafluoro-2,4-bis(trifluoromethyl)pentyl methacrylate, content 30 wt%

core-shell fluoroacrylate copolymer latex; monomer(s): butyl acrylate; methyl methacrylate; 2,3,4,5,5,5-hexafluoro-2,4-bis(trifluoromethyl)pentyl methacrylate, content 30 wt%

3069-21-4

dodecyltrimethoxysilane

silica-containing fluoroacrylate copolymer latex, tetraethoxysilane content 2.20 wt%; monomer(s): butyl acrylate; methyl methacrylate; 2,3,4,5,5,5-hexafluoro-2,4-bis(trifluoromethyl)pentyl methacrylate, content 30 wt%; dodecyltrimethoxysilane

silica-containing fluoroacrylate copolymer latex, tetraethoxysilane content 2.20 wt%; monomer(s): butyl acrylate; methyl methacrylate; 2,3,4,5,5,5-hexafluoro-2,4-bis(trifluoromethyl)pentyl methacrylate, content 30 wt%; dodecyltrimethoxysilane

Conditions
ConditionsYield
With hydrogenchloride; tetraethoxy orthosilicate at 75℃;

Dodecyltrimethoxysilane Specification

The CAS registry number of Silane,dodecyltrimethoxy- is 3069-21-4. Its EINECS registry number is 221-332-4. The systematic name is dodecyl(trimethoxy)silane. In addition, the molecular formula is C15H34O3Si and the molecular weight is 290.51. It is also called dodecyltrimethoxysilane. What's more, it is a kind of colorless to yellowish transparent liquid and belongs to the classes of Alkyl; Si (Classes of Silicon Compounds); Si-O Compounds; Trialkoxysilanes; Alkoxy Silanes; Hydrophobing Agents. And it should be stored in a cool and dry place.

Physical properties about this chemical are: (1)ACD/LogP: 5.98; (2)# of Rule of 5 Violations: 1; (3)ACD/LogD (pH 5.5): 5.98; (4)ACD/LogD (pH 7.4): 5.98; (5)ACD/BCF (pH 5.5): 20687.76; (6)ACD/BCF (pH 7.4): 20687.76; (7)ACD/KOC (pH 5.5): 42734.05; (8)ACD/KOC (pH 7.4): 42734.05; (9)#H bond acceptors: 3; (10)#H bond donors: 0; (11)#Freely Rotating Bonds: 14; (12)Polar Surface Area: 27.69 Å2; (13)Index of Refraction: 1.429; (14)Molar Refractivity: 85.49 cm3; (15)Molar Volume: 330.9 cm3; (16)Polarizability: 33.89×10-24cm3; (17)Surface Tension: 25.9 dyne/cm; (18)Density: 0.877 g/cm3; (19)Flash Point: 108.6 °C; (20)Enthalpy of Vaporization: 45.25 kJ/mol; (21)Boiling Point: 234.9 °C at 760 mmHg; (22)Vapour Pressure: 0.0787 mmHg at 25°C.

Preparation of Silane,dodecyltrimethoxy-: This chemical can be prepared by methanol; potassium salt and trihydroxydodecylsilan. It is a kind of etherification reaction. The reaction will need reagent hexane. The reaction time is 5 days with temperature of 20°C, and the yield is about 79%.

 Silane,dodecyltrimethoxy- can be prepared by methanol; potassium salt and trihydroxydodecylsilan

When you are using this chemical, please be cautious about it as the following:
 It is irritating to eyes, respiratory system and skin. When you are using it, wear suitable protective clothing, gloves and eye/face protection. In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.

Addtionally, the following datas could be converted into the molecular structure:
(1)SMILES: O(C)[Si](OC)(OC)CCCCCCCCCCCC
(2)InChI: InChI=1/C15H34O3Si/c1-5-6-7-8-9-10-11-12-13-14-15-19(16-2,17-3)18-4/h5-15H2,1-4H3
(3)InChIKey: SCPWMSBAGXEGPW-UHFFFAOYAB

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