Cas 78-10-4 Tetraethyl orthosilicate TEOS

    Ethyl silicate is also known as Tetraethyl orthosilicate,colorless, transparent liquid with special smell.  Stable under the condition of anhydrous, when encountering water, it decomposes into ethanol and silicic acid, cloudy in moist air, soluble in alcohol, ether and other organic solvents.

    Ethyl silicate is a flammable, colourless liquid with a mild, sweet, alcohol-like odour.  Exposure to ethyl silicate can occur through inhalation, ingestion, and eye or skin contact.  It is practically insoluble in water, soluble in alcohol, and slightly soluble in benzene.

Uses：

1. Tetraethyl orthosilicate is Used as insulating materials in electronic industry, also used for optical glass processing and used as coagulants.
2. For precision casting, as a sand binder. Metal surface treated by ethyl silicate vapor can be anticorrosion and waterproof. Ethyl silicate can be used to bleed on the metal surface of the silicon, processing optical glass can improve its light transmittance. Fine silica powder produced by complete hydrolysis can be used to manufacture the phosphor. Ethyl silicate is raw material for silicone oil. Ethyl silicate can also be used to manufacture heat-resistant, chemical-resistant coatings. In Japan, 90% of ethyl silicate is used as an anti-corrosion coating (zinc-rich paint) base material.
3. Tetraethyl orthosilicate is Mainly used in chemical-resistant coatings and heat-resistant coatings, used as silicone solvent and precision-made binder. Fine silica powder produced after complete hydrolysis, used for the manufacture of phosphor, also used as a chemical reagent.
4. Tetraethoxysilane is mainly used in optical glass, chemical resistant coatings and heat-resistant coatings and adhesives, modification for anti-corrosion coating, used as crosslinking agent, a binder, a dehydrating agent, used for manufacturing catalyst skeleton, high purity ultrafine silica.
5. Used as Insulating materials in electronic industry, coatings, optical glass treatment agents, coagulants, used for organic synthesis, used as solvents for the preparation of organosilicon.

Melting point	-77 °C
Boiling point	168 °C(lit.)
density	0.933 g/mL at 20 °C(lit.)
vapor density	7.2 (vs air)
MF