18395-30-7

Basic information

• Product Name: Isobutyltrimethoxysilane
• Synonyms: CI7810;Dynasylan IBTMO;Silane, trimethoxy(2-methylpropyl)-;trimethoxy(2-methylpropyl)-silan;ISOBUTYLTRIMETHOXYSILANE;Trimethoxy(2-methylpropyl)silane;Isobutyltrimethoxysilane Prosil R 178;Isobutyltrimethoxysilan
• CAS NO: 18395-30-7
• Molecular Formula: C₇H₁₈O₃Si
• Molecular Weight: 178.3
• EINECS: 242-272-5
• Product Categories: Alkoxy Silanes;Hydrophobing Agents;Organosilicon;SilanesOrganometallic Reagents;Solution Deposition Precursors;Trialkoxysilanes;RSi(OR)3Self Assembly&Contact Printing;POSS? Precursors and Intermediates;Self-Assembly Materials;Silsesquioxanes: POSS? Nanohybrids
• Mol File: 18395-30-7.mol
• Article Data: 5

Chemical Properties

• Melting Point: <0°C
• Boiling Point: 154 °C(lit.)
• Flash Point: 103 °F
• Appearance: Clear to straw liquid with mild odor
• Density: 0.93 g/mL at 25 °C(lit.)
• Vapor Pressure: 4.17mmHg at 25°C
• Refractive Index: n20/D 1.396(lit.)
• Storage Temp.: 2-8°C
• Sensitive: Moisture Sensitive
• BRN: 2233976
• CAS DataBase Reference: Isobutyltrimethoxysilane(CAS DataBase Reference)
• NIST Chemistry Reference: Isobutyltrimethoxysilane(18395-30-7)
• EPA Substance Registry System: Isobutyltrimethoxysilane(18395-30-7)

Safety Data

• Hazard Codes: Xn
• Statements: 10-20/22-36/37/38
• Safety Statements: 7-16-24-26-45-36/37/39
• RIDADR: UN 1993 3/PG 3
• WGK Germany: 1
• F: 21
• TSCA: Yes
• HazardClass: 3
• PackingGroup: III
• Hazardous Substances Data: 18395-30-7(Hazardous Substances Data)

Usage

Chemical Properties

Colorless clear liquid.

Uses

Isobutyl(trimethoxy)silane-modified substrates were used for the preparation of gold films by absorption and adsorption.{87} It may be used as silane precursors for the synthesis of xerogels.{88}

Flammability and Explosibility

Flammable

InChI:InChI=1/C7H18O3Si/c1-7(2)6-11(8-3,9-4)10-5/h7H,6H2,1-5H3

Upstream product

• 681-84-5 tetramethylorthosilicate 
• 78-77-3 Isobutyl bromide 
• 926-62-5 isobutylmagnesium bromide 
• 2487-90-3 trimethoxysilane 
• 563-47-3 3-Chloro-2-methylpropene 
• 18165-87-2 isobutylsilane 

Downstream Products

• 307531-92-6 1,3,5,7,9,11,14-heptaisobutyltricyclo[7.3.3.15,11]heptasiloxane-endo-3,7,14-triol 

Relevant articles and documents

Siloxanes from the hydrolysis of isopropyltrimethoxysilane

The behavior of isopropyltrimethoxysilane (1) in the presence one equivalent of water and a dibutyltin dilaurate catalyst has been investigated.Under these conditions, partial hydrolysis of the methoxy groups of 1 occurred, followed by condensation reactions leading to the formation of low molecular-weight oligomers.Disiloxane 4, trisiloxane 6 and cyclic siloxanes 7 and 8 have been isolated and fully characterized.Transient reaction intermediates silanol 3 and hydroxydisiloxane 5 have been characterized spectroscopically.The time evolution of these species was followed by gas chromatography and 29Si NMR.A reaction scheme for the hydrolytic condensation of 1 is proposed to accommodate these results. Keywords: Silicon; Siloxanes; Hydrolysis; Nuclear magnetic resonance

PROCESS FOR MAKING HALOORGANOALKOXYSILANES

A haloorganoalkoxysilane is prepared by reacting an olefinic halide with an alkoxysilane in which the alkoxy group(s) contain at least two carbon atoms in a reaction medium to which has been added a catalytically effective amount of ruthenium-containing catalyst and a reaction-promoting effective amount of an electron-donating aromatic compound promoter. The process can be used to prepare, inter alia, chloropropyltriethoxysilane, which is a key intermediate in the manufacture of silane coupling agents.

Process for preparing low-chloride or chloride-free alkoxysilanes

A process for preparing an alkoxysilane with an acidic chloride content of less than 10 ppm by weight, comprising: reacting a chlorosilane with an alcohol in a water-free and solvent-free phase to form a product mixture containing alkoxysilane and residual acidic chloride, with removal of resultant hydrogen chloride from the product mixture, then adding liquid or gaseous ammonia, in an amount corresponding to a stoichiometric excess, based on the content of acidic chloride, to form an ammonia-containing product mixture, treating the ammonia-containing product mixture at a temperature between 10 and 50 DEG C., wherein the ammonia and acidic chloride undergo neutralization, to form a crude product, and optionally, then separating off a salt formed in the course of neutralization, from the crude product, and recovering the alkoxysilane by distilling the crude product.