Tetraethyl Orthosilicate (TEOS) Crosile® SI28, 32, 40
Chemical Properties
Ethyl silicate, formally referred to as tetraethyl orthosilicate or tetraethoxysilane (TEOS), is an organic chemical compound represented by the formula Si(OC2H5)4. It exists in the form of a colorless liquid and can deteriorate upon contact with water. TEOS functions as the ethyl ester of orthosilicic acid, Si(OH)4, and is renowned as the most abundant silicon alkoxide.
Specifications
Test Item |
Target Values(Spec, Limits) |
||
Appearance |
Colorless Transparent Liquid |
||
Chemical name |
|||
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 |
Application
TEOS, or tetraethyl orthosilicate, is a versatile compound with various applications. It is commonly used as a crosslinking agent in silicone polymers and as a precursor to silicon dioxide in the semiconductor industry. TEOS is also utilized as a source of silica for synthesizing certain zeolites. Additionally, it finds use in coatings for carpets and other objects, as well as in the production of aerogel. These applications take advantage of the reactivity of the Si-OR bonds present in TEOS.
Furthermore, TEOS has a historical application as an additive in alcohol-based rocket fuels, significantly reducing heat flux in regeneratively cooled engines by over 50%. In the steel casting industry, TEOS serves as an inorganic binder and stiffener for creating silica-based ceramic molding forms. It can also be used as an inorganic binder for coatings, providing water, oxygen, and high-temperature resistance to materials like steel, glass, brass, and even wood. TEOS acts as an additive in solid polymers, enhancing adhesiveness to glass, steel, or wood surfaces. Moreover, it acts as a binder for porcelain teeth crowns and serves as a precursor to siloxanes, further expanding its range of applications.
- Adhesion promoter for paints & coatings
- Precision casting materials and ceramic materials
- Silicone rubber cross-linking agent.