Silane Coupling Agent Tetraethyl Orthosilicate (TEOS) Crosile Si28 in Optical Glass Treatment and Coagulant

Ethyl Silicate-28 is a monomeric ethyl silicate, also known as tetraethyl orthosilicate (TEOS). After hydrolysis, it yields 28 wt.% silica, hence the name Ethyl Silicate-28. It has the following chemical formula.

  • Item NO.:

    Crosile®Si 28
  • Chemical Name:

    Tetraethyl orthosilicate
  • Chemical Formula:

    C8H20O4Si
  • CAS No.:

    78-10-4
  • EINECS No:

    201-083-8
  • 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.

Silane Coupling Agent Tetraethyl Orthosilicate (TEOS) Crosile Si28 in Optical Glass Treatment and Coagulant

 

 

Chemical Properties

Ethyl Silicate 28 is a blend of tetraethoxysilane and polyethoxysiloxane with a mass fraction of silica (SiO2) ranging from 28.8 - 29.5%. Soluble in solvents such as toluene, benzene, and ethanol. Ethylsilicate 28 is prepared by the reaction of silicon tetrachloride and ethanol.

 

Equivalent type
ethyl silicate 28, TEOS, ethyl silicate, tetraethyl orthosilicate, tetraethyl silicate, tetraethyl orthosilicate, tetraethoxysilane, silicic acid (H4SIO4), tetraethyl silicate Ester, Tetraethyl Silicate

 

Specifications

Test Item

Target Values

(Spec, Limits)

Appearance

Colorless Transparent Liquid

Chroma (APHA)

<10

Content

>99.5%

Specific gravity at 20°C

0.929-0.936

Silicon dioxide content

28%

Acidity (as HCL)

<0.001

Other content

0-5ppm

Viscidity

0.97 cps

 

Application

1. Ethyl silicate (TEOS) is a colorless liquid, mainly used as heat-resistant coatings, chemical-resistant coatings, silane coupling agents, organic synthesis intermediates and chemical vapor deposition (CVD) SiO2 films in the semiconductor field etc.
 
2. It is used as insulating material in electronic industry, and also used as optical glass treatment and coagulant.
 
3. For precision casting, as a binder for sand molds; the metal surface treated with ethyl silicate vapor can be anti-corrosion and waterproof. Ethyl silicate can be used to infiltrate metal surfaces with silicon, and optical glass can be treated to improve light transmittance; ultra-fine silicon oxide powder produced after complete hydrolysis can be used to manufacture phosphors. Ethyl silicate is the raw material of silicone oil. Ethyl silicate can also be used to make heat and chemical resistant coatings.
 
4. Insulation materials, coatings, optical glass treatment agents, coagulants, organic synthesis, solvents for preparing silicones for the electronics industry.

Silane Coupling Agent Tetraethyl Orthosilicate (TEOS) Crosile Si28 in Optical Glass Treatment and Coagulant

 

Packing:

16 kg /drum, 180 kg /drum.

 

Storage:

Kept in a low temperature, dry and ventilated place, avoid direct sunlight.

 

Shelf life:

One year in a ventilating, cool and dry area.

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