Tetraethyl Orthosilicate TEOS Crosile® Si28 Si32 Si40

Tetraethyl orthosilicate (TEOS), also known as tetraethoxysilane, is an organosilicon compound with the chemical formula Si(OC₂H₅)₄. This colorless liquid undergoes hydrolysis when exposed to water and forms silica networks through condensation reactions. TEOS is the ethyl ester of orthosilicic acid and is one of the most widely used silicon alkoxide compounds.

Item NO.:
TEOS list
Chemical Name:
Tetraethyl orthosilicate
Chemical Formula:
C2H6O3SI
CAS No.:
78-10-4,11099-06-2,68412-37-3
Properties:
Colorless transparent liquid; Soluble in a variety of organic solvents; Easy to hydrolysis; Able for condensation to form polysiloxanes; Easy to polymerize in the presence of overheating, light and peroxide.

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Tetraethyl Orthosilicate (TEOS) Crosile® SI28, SI32, SI40 | Silane Coupling Agent | Ecopower

Ecopower mainly factroy in China ,can stable supply below product types for longer time .

Chemical Properties

Crosile® Si28, Si32, and Si40 are ethyl silicate products with different silica (SiO₂) contents. They are produced through controlled hydrolysis and condensation of tetraethyl orthosilicate (TEOS), offering excellent solubility, hydrolysis reactivity, and the ability to form durable silica networks after curing.

Equivalent type

Ethyl silicate, TEOS, Silicon ethoxide, Tetraethoxysilan, Silicon tetraethoxide, Teraethoxysilane, Silicic acid, ethyl ester, Ethyl polysilicate, Ethyl Silicate, tetraethyl orthosilicate

Specifications

Test Item	Target Values(Spec, Limits)
Appearance	Colorless Transparent Liquid
Chemical name	Crosile® Si28	Crosile® Si32	Crosile® Si40
SiO2 Content	28%	32%	40%
Flash Point	181°C	38°C	Min.62°C
Boiling Point	169°C	96°C	160°C
Refractive Index	1.3830	1.00	1.397