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333859 Aldrich

Tetraethyl orthosilicate

99.999% trace metals basis

Synonym: Orthosilicic acid tetraethyl ester, Silicon tetraethoxide, TEOS, Tetraethoxysilane, Tetraethoxysilicon(IV), Tetraethyl silicate



Related Categories Chemical Synthesis, Materials Science, Micro/NanoElectronics, Organometallic Reagents, Organosilicon,
vapor density   7.2 (vs air)
vapor pressure   <1 mmHg ( 20 °C)
assay   99.999% trace metals basis
form   liquid
refractive index   n20/D 1.382(lit.)
bp   168 °C(lit.)
density   0.933 g/mL at 20 °C(lit.)



Commonly used as a precursor to prepare xerogel

Will interact with dodecylamine in the formation of intercalation compounds of H+-magadiite and used in a study of mixed-metal bioactive glasses.


25, 100 mL in glass bottle

Price and Availability

Suggested Laboratory Gloves

Laboratory GlovesThis substance has been tested against several types of hand protection for CE compliance. Click below to find the recommended gloves for handling this product.

Safety & Documentation

Safety Information

Signal word 
Hazard statements 
UN1292 - class 3 - PG 3 - Tetraethyl silicate
WGK Germany 
Flash Point(F) 
113 °F
Flash Point(C) 
45 °C
Protocols & Articles


Bio-Inspired “Green” Synthesis of Nanomaterials and their Applications

Dr. Siddharth V. Patwardhan Department of Chemical and Process Engineering University of Strathclyde, 75 Montrose Street Glasgow G1 1XJ, UK Email: Siddharth.Patwardhan@strath.ac.uk
Keywords: Adsorption, Agriculture, Apoptosis, Cancer, Catalysis, Condensations, Cosmetics, Deposition, Environmental, Enzyme activity, Green chemistry, Hydration reaction, Immobilization, Microwave synthesis, Nanomaterials, Pharmaceutical, Precipitation, Reductions, Separation, Sol-gel, Solvents

Development of a Hermetic Barrier Using Vinyl Triethoxysilane (VTEOS) and Sol-Gel Processing

Humidity barriers are an essential part of microelectronics, micro-electromechanical systems (MEMS) and displays using organic-light emitting diodes (OLEDs). These barriers are required to have low p...
Ariel Jackson, Dr. Andrei Jitianu, Professor Lisa C. Klein
Material Matters 2006, 1.3, 11.
Keywords: Applications, Condensations, Electronics, Infrared spectroscopy, Materials Science, Microelectronics, Polymerization reactions, Radical polymerization, Sol-gel, Spectra, Spectroscopy

From Form to Function: Molding Porous Materials in Three Dimensions by Colloidal Crystal Templating

Methods of structuring materials with submicrometer features in two dimensions have become highly sophisticated. For example, lithographic methods are now capable of carving out several hundred milli...
Melissa A. Fierke, Fan Li, and Prof. Andreas Stein
Material Matters 2008, 3.1, 10.
Keywords: Applications, Centrifugation, Chemical vapor deposition, Combustion, Deposition, Diffraction, Diffusion, Emulsion polymerization, Filtration, Methods, Photographs, Polymerization reactions, Precipitation, Semiconductor, Sol-gel

High Purity Metalorganic Precursors for CPV Device Fabrication

Thin film photovoltaic devices have become increasingly important in efficiently harnessing solar energy to meet consumer demand. Conventional crystalline silicon solar cells have demonstrated remark...
Ravi Kanjolia
Material Matters Volume 5 Article 4
Keywords: Absorption, Chemical vapor deposition, Degradations, Deposition, Mass spectrometry, Nuclear magnetic resonance spectroscopy, Purification, Semiconductor, Solar cells, Spectroscopy, Tissue microarrays, Vaporization

Mesoporous Oxides and Their Applications to Hydrogen Storage

Solid-state hydrogen storage is attractive from a technological point of view, but has encountered tremendous challenges in terms of practical storage capacity and kinetics.1-3 Hydrogen sorption, whe...
Arlon J. Hunt1, Karl Gross2, Samuel S. Mao1
Material Matters Volume 4 Article 2
Keywords: Addition reactions, Adsorption, Applications, Catalysis, Chemical vapor deposition, Condensations, Deposition, Diffusion, Insecticides, Magnetic resonance spectroscopy, Material Matters, Methods, Microscopy, Nanomaterials, Photographs, Scanning electron microscopy, Size-exclusion chromatography, Sol-gel, Substitutions, Transmission electron microscopy

Recent Developments in Silicon Anode Materials for High Performance Lithium-Ion Batteries

Xuefeng Song,1* Xiaobing Wang,2 Zhuang Sun,1 Peng Zhang,1 and Lian Gao1 1State Key Laboratory for Metallic Matrix Composite Materials, School of Materials Science and Engineering, Shanghai Jiao Tong ...
Keywords: Automotive, Deposition, Diffusion, Electrochemical reactions, Environmental, Lithiations, Materials Science, Microscopy, Nanomaterials, Nanotubes, Polymerization reactions, Reductions, Scanning electron microscopy, Transmission electron microscopy

Sol-Gel Science for Ceramic Materials

Silicon-based research has drawn much attention in recent years with targeted organizations such as the International Sol-Gel Society hosting workshops,1 and the Sol-Gel Gateway2 hosting a compendium...
Dr. Sandra Kay Young
Material Matters 2006, 1.3, 8.
Keywords: Applications, Articles, Ceramics, Chemfiles, Condensations, Deposition, Evaporation, Hydrosilylations, Infrared spectroscopy, Ligands, Newsletters, Nuclear magnetic resonance spectroscopy, Polymerization reactions, Sol-gel, Spectra, Type

Synthesis of Melting Gels Using Mono-Substituted and Di-Substituted Alkoxysiloxanes

Hybrid organic-inorganic sol-gel materials containing silica were first called “ORMOSILs” in 1984.1 Since then, the number of hybrid organicinorganic combinations has increased rapidly.2 Hybrid mater...
Lisa C. Klein and Andrei Jitianu
Material Matters, Volume 7, Number 2, 8–14
Keywords: Absorption, Adhesion, Calorimetry, Combustion, Condensations, Deposition, Exothermic, Filtration, Materials Science, Melting, Oxidations, Polymerization reactions, Purification, Semiconductor, Sol-gel, Solar cells, Solvents, Spin coating, Substitutions, Thermal analysis

Vistas in Current Magnetic Materials Research

Magnetism and magnetic materials have been of scientific interest for over 1,000 years. More recently, fundamental investigations have focused on exploring the various types of magnetic materials and...
Keywords: Automotive, Ceramics, Detection methods, Electronics, Materials Science, Nanomaterials, Precipitation, Semiconductor

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