18171-19-2

Appearance：Colorless transparent liquid

Density：1.019

Boiling Point：70-72ºC (11 mmHg)

Melting Point：<0ºC

Flash Point：168°F

Refractive Index：1.426

Vapor Pressure：1.115mmHg at 25°C

Cas No: 18171-19-2

Tetraethyl Orthosilicate (TEOS) is a colorless liquid with the molecular formula Si(C2H5)4. It is an organosilicon compound and is used in a variety of applications, including coating and resin production, as a catalyst for polymerization and as a reactant for the production of silicates and silicones.

TEOS is used in the production of ceramics, resins, and coatings, such as silicones, silanes, and siloxanes. It is an important precursor to many other organosilicon compounds. It is used in the production of ceramic coatings, such as those used on glass, as well as in the production of silica-based gels and fillers.

TEOS is also used as a catalyst in the polymerization of various monomers. It is used to catalyze the polymerization of styrene and methyl methacrylate. It is also used to catalyze the ring-opening polymerization of lactones and the copolymerization of styrene and butadiene.

TEOS is also used in the production of silicates and silicones. It is used as a reactant in the production of silicate-based coatings, adhesives, and sealants. It is also used in the production of silicones, such as silane-based and siloxane-based elastomers.

TEOS is an important precursor to many other organosilicon compounds, including silanes, siloxanes, and silazanes. It is also used in the production of nanomaterials, such as nanotubes and nanowires.

TEOS is a hazardous material and must be handled with caution. It is flammable, toxic, and can be irritating to the skin and eyes. It should be stored in a cool, dry place, away from heat, sparks, and open flames. Proper protective clothing and equipment should be used when handling it.