Silicic Acid Esters | Silicates | Polysilicates | Orthosilicates | Silane Passivating Agents

SiSiB® PC5420

Tetraethoxysilane (TEOS) .
Synonym: Тетраэтокси-силан
Tetraethyl Orthosilicate
Ethyl Polysilicate 28
Ethyl Silicate 28

Countertype of Evonik DYNASIL A, Catylen D1000, DowCorning Z-6697, ShinEtsu KBE-04, Wacker SILICATE TES 28, Silquest TEOS

Chemical Structure


SiSiB® PC5420, the ethyl ester of orthosilicic acid, is a colorless, low-viscosity liquid with an SiO2 content of 28.5%.

Typical Physical Properties

Chemical Name: Tetraethoxysilane
CAS No.: 78-10-4
EINECS No.: 232-136-3
Empirical Formula: C4H20O4Si
Molecular Weight: 208.3
Boiling Point: 168°C [760mmHg]
Flash Point: 46°C
Color and Appearance: Colorless transparent liquid
Density [25°C]: 0.934
Refractive Index [25°C]: 1.3838 [25°C]
Purity: Min.99.0% by GC


SiSiB® PC5420 may be used as an inorganic binder for refractory fillers and pigments, like precision investment castings.

SiSiB® PC5420 may be used as a second backup casting coating. It cures faster than colloidal silica system.

SiSiB® PC5420 may be hydrolyzed to form silicon dioxide (silica).

SiSiB® PC5420 may be used as a binder in zinc-rich (corrosion resistant) coating.

SiSiB® PC5420 may be used as a starting material for sol-gel process.

SiSiB® PC5420 may be used as a crosslinking agent for silicone sealant.

SiSiB® PC5420 may be used as a drying agent in sealing compositions.

SiSiB® PC5420 may be used as a chemical intermediate


Net weight 190Kg steel drum or 900Kg IBC container, for more details, please visit Packing Centre.

Technical Library

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