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Tetraethyl orthosilicate

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Origin: China

Cas No: 78-10-4

Specification: 99%min

Min order Quantity: 1 /kg

Supply Ability: 80 mt/month

Lead time: 7 days for OEM, 3 days for ready goods

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Products Specification
Product Description

Quick Details

CAS No.:: 78-10-4

Other Names:: Tetraethyl Orthosilicate

MF:: C8H20O4Si

EINECS No.:: 201-083-8

Place of Origin:: Henan, China

Type:: Agrochemical Intermediates, Dyestuff Intermediates, Flavor & Fragrance Intermediates

Purity:: 99, 99%

Brand Name:: HNDD

Model Number:: 78-10-4

Application:: Organic synthesis

Appearance:: Colorless Transparent Liquid

Certification:: ISO9001

CAS number:: 78-10-4

Melting Point(℃):: -77

Molecular Weight:: 208.328

Water Solubility:: Hydrolysis

Packaging&Delivery

Packaging Details: plastic Drum/according to customer's requirements

Port: Shanghai Shenzhen Qingdao

Lead Time:

Quantity(Kilograms)	1 - 1	2 - 100	101 - 1000	>1000
Est. Time(days)	3	3	5	To be negotiated

Products Description

item	value
CAS No.	78-10-4
Other Names	Tetraethyl Orthosilicate
MF	C8H20O4Si
EINECS No.	201-083-8
Place of Origin	China
	Henan
Type	Agrochemical Intermediates, Dyestuff Intermediates, Flavor & Fragrance
Purity	99
Brand Name	HNDD
Model Number	78-10-4
Application	Organic synthesis
Appearance	Colorless Transparent Liquid
Certification	ISO9001
CAS number	78-10-4
Purity	99%
Melting Point(℃)	-77
Molecular Weight	208.328
Water Solubility	Hydrolysis

Property

CAS No.: 78-10-4 Formula: C8H20O4Si Molecular Weight: 208.32700

Description

Tetraethyl orthosilicate is the chemical compound with the formula Si(OC2H5)4. Often abbreviated TEOS, it is a colorless liquid that degrades in water. TEOS is the ethyl ether of orthosilicic acid, Si(OH)4. It is a prototypical alkoxide.
TEOS is a tetrahedral molecule. Like its many analogues, TEOS is prepared by alcoholysis of silicon tetrachloride:; SiCl4 + 4 EtOH → Si(OEt)4 + 4 HCl; where Et = C2H5.

Basic Info

Chemical Name	Tetraethyl orthosilicate
Synonyms	ethyl orthosilicate; Silicic acid (H4SiO4), tetraethyl ester; tetraethyl ortosilicate; Silester; tetra-ethyl orthosilicate; tetraethyl silicate; Dynasil A; silicic acid tetraethyl ester; TEOS; silikanl;
CAS No.	78-10-4
Molecular Formula	C8H20O4Si
Molecular Weight	208.32700
PSA	36.92000
LogP	1.56800

Properties

Appearance & Physical State	clear colorless liquid with a faint odor
Density	0.934
Boiling Point	166-169ºC
Melting Point	-77ºC
Freezing Point	-77℃
Flash Point	45ºC
Refractive Index	n20/D 1.382(lit.)
Water Solubility	Hydrolysis
Stability	Stable. Flammable. Incompatible with strong oxidizing agents, water, alkalies, mineral acids.
Storage Condition	Flammables area
Vapor Density	7.2 (vs air)
Vapor Pressure	<1 mm Hg ( 20 °C)

Safety Info

RTECS	VV9450000
Hazard Class	3
Safety Statements	16-36/37/39
HS Code	2920909090
Packing Group	III
WGK Germany	1
RIDADR	UN 1292 3/PG 3
Risk Statements	R10; R20; R36/37
Hazard Codes	Xn
Hazard Declaration	H226; H319; H332; H335
Signal Word	Warning
Symbol	GHS02, GHS07
Caution Statement	P210; P261; P280; P304 + P340 + P312; P337 + P313; P403 + P235

Synthesis Route

Triethoxysilane+Allyl chloride→Tetraethyl orthosilicate+(3-chloropropyl)-diethoxy-chlorosilane
Triethoxysilane+Allyl chloride→Tetraethyl orthosilicate+3-Chloropropyltriethoxysilane
Ethanol→Tetraethyl orthosilicate+dichloro(diethoxy)silane

Precursor

Ethanol
Triethoxysilane
Diethylamine
silicon atom

Downstream Product

difluorodiethoxysilane
dimethyl-diethoxytin
ethoxy(trimethyl)stannane
1,1-diethoxybut-2-ene

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