Tetraethyl orthosilicate

ALDRICH/131903 - reagent grade, 98%

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

CAS Number: 78-10-4
Empirical Formula (Hill Notation): C₈H₂₀O₄Si
Molecular Weight: 208.33
EC Number: 201-083-8
MDL Number: MFCD00009062
Linear Formula: Si(OC₂H₅)₄
Product Type: Chemical

Catalog Number	PKG Qty.	Price


45-131903-25ML	25 mL	$35.00 1/EAAdd To Favorites	Add To Favorites
45-131903-500ML	500 mL	$42.10 1/EAAdd To Favorites	Add To Favorites
45-131903-1L	1 L	$69.70 1/EAAdd To Favorites	Add To Favorites
45-131903-4L	4 L	$244.00 1/EAAdd To Favorites	Add To Favorites

assay	98%
bp	168 °C (lit.)
density	0.933 g/mL at 20 °C (lit.)
form	liquid
grade	reagent grade
InChI	1S/C8H20O4Si/c1-5-9-13(10-6-2,11-7-3)12-8-4/h5-8H2,1-4H3
InChI key	BOTDANWDWHJENH-UHFFFAOYSA-N
Quality Level	200
refractive index	n20/D 1.382 (lit.)
SMILES string	CCO[Si](OCC)(OCC)OCC
vapor density	7.2 (vs air)
vapor pressure	<1 mmHg ( 20 °C)

Application:	Commonly used as a precursor to prepare xerogel
Application:	Tetraethyl orthosilicate can be used: • As an anti-solvent to fabricate efficient perovskite layer for inverted planar solar cells with enhanced power conversion efficiency and reproducibility. TEOS helps to achieve high-quality perovskite films with reduced density of defects, and thus slower carrier recombination. • As a sol-gel precursor to synthesize SiO₂-TiO₂ anti-reflective self-cleaning coatings for solar cells. • To fabricate nano silica functionalized crosslinked hybrid membranes for proton exchange membrane fuel cell applications. These membranes have better proton conductivity and thermal stability. • To prepare poly(vinylidene fluoride)/TEOS matrix separator to enhance the performance of Li-ion batteries. The separator exhibits excellent electrolyte retention and wettability.
Application:	Will interact with dodecylamine in the formation of intercalation compounds of H⁺-magadiite and used in a study of mixed-metal bioactive glasses.
Features and Benefits:	• Excellent adhesion on substrates • Uniform film deposition • Cross-linker to introduce polymer strands into hydrogel
General description:	Tetraethyl orthosilicate(TEOS) is a colorless liquid alkoxide widely used as precursor to deposition of silicon dioxide (SiO₂) thin films. It is also utilized in hydrogels, nanoparticle-based drug delivery systems, and chemical crosslinking of polymers.
Packaging:	1, 2.5, 4 L in glass bottle
Packaging:	25, 250, 500 mL in glass bottle

Symbol	GHS02,GHS07
Signal word	Warning
Hazard statements	H226 - H319 - H332 - H335
Precautionary statements	P210 - P233 - P240 - P241 - P304 + P340 + P312 - P305 + P351 + P338
Hazard Codes	Xn
Risk Statements	10-20-36/37
RIDADR	UN1292 - class 3 - PG 3 - Tetraethyl silicate
WGK Germany	WGK 1
Flash Point(F)	113.0 °F - closed cup
Flash Point(C)	45 °C - closed cup

Purity	98%
bp	168 °C (lit.)
Density	0.933 g/mL at 20 °C (lit.)
Refractive Index	n20/D 1.382 (lit.)
UNSPSC	12352103