C8H20O4Si

C8H20O4Si is the chemical formula for ethyl silicate. It is a colorless liquid with a relatively low viscosity and a distinct odor. Ethyl silicate is an organosilicon compound, meaning it contains carbon-silicon bonds. Its structure features a silicon atom bonded to four ethoxy groups (-OCH2CH3). This arrangement makes it a tetraalkoxysilane.

Industrially, ethyl silicate is primarily used as a binder and crosslinking agent. It is a key component in the production of ceramic molds, particularly in the investment casting process, where it helps create precise and durable molds for metal casting. It is also utilized in the formulation of high-temperature coatings, heat-resistant paints, and as a component in some types of adhesives. In the realm of fine chemicals and research, it can serve as a precursor for the synthesis of other silicon-containing materials and as a source of silica.

Ethyl silicate undergoes hydrolysis in the presence of water and a catalyst (often an acid or base) to form silicic acid, which then condenses to produce silicon dioxide (silica). This controlled hydrolysis and condensation are fundamental to its applications in creating inorganic matrices and coatings. It is generally considered to have low toxicity but should be handled with appropriate safety precautions, including adequate ventilation, as its vapors can be irritating.