Product Overview

Crosile® SI28 is a monomeric ethyl silicate, commonly known as tetraethyl orthosilicate (TEOS). Upon hydrolysis, it yields 28 wt.% silica, hence its designation as Ethyl Silicate-28. This product boasts the chemical formula Si(OC2H5)4.

Chemical Information

• 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 various organic solvents including toluene, benzene, and ethanol
• Easily hydrolyzed
• Capable of condensation to form polysiloxanes
• Prone to polymerization in the presence of overheating, light, and peroxide

Specifications

• 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
• Viscosity: 0.97 cps

Applications

1. Paint and Varnish Coatings:
   • Varnishes and paints with exceptional adhesion to glass
   • Components for non-stick coatings
   • As a binder component in heat-, chemical-, and weather-resistant coatings
   • Forms a fast-drying, heat-resistant, water-repellent film with low shrinkage and stable gloss
2. Polymer Additives:
   • Enhances transparency and creates a "gas barrier" in food packaging, extending product freshness and shelf life
   • Silicone rubber crosslinking agent
3. Chemical Industry:
   • Source of high-quality amorphous silica and high-purity TEOS
   • Organic synthesis reagents
   • Dehydrator
4. Metallurgical Engineering:
   • Used in the foundry industry as a raw material for binders in the manufacture of ceramic moulds
   • Adhesive for high-temperature rods and carbide parts
5. Glass Manufacturing:
   • Imparts a hydrophobic effect, mechanical and chemical resistance, and light scattering to glass
   • Improves appearance and protects glass surfaces from corrosion