Tetraethyl silicate

Tetraethyl silicate is an organosilicon compound with the chemical formula C8H20O4Si and CAS number 78-10-4. It is a silicon ester formed by the reaction of silicic acid with ethanol. With a molecular weight of 208.33 g/mol, this compound serves as an important precursor in silica chemistry and materials science applications.

Tetraethyl silicate is typically a colorless liquid at room temperature with a characteristic alcoholic odor. It has limited solubility in water but is miscible with most organic solvents including alcohols and ethers. The compound is classified as a flammable liquid (Class 3) and exhibits moderate volatility under standard conditions.

Tetraethyl silicate is primarily used as a precursor for silica production in sol-gel processes, ceramic manufacturing, and glass coating applications. It serves as a crosslinking agent in polymer chemistry, a binder in refractory materials, and a source of silica in the production of optical fibers and semiconductor materials.

Tetraethyl silicate requires careful handling due to its flammable nature and potential health hazards. Wear appropriate PPE including safety goggles, gloves, and protective clothing. Work in well-ventilated areas away from ignition sources. The compound can cause eye irritation and has acute toxicity properties, requiring careful exposure control measures.

Tetraethyl silicate should be stored in tightly sealed containers in a cool, dry, well-ventilated area away from heat sources and incompatible materials. Keep away from strong acids, bases, and oxidizing agents. Storage areas should be equipped with appropriate fire suppression systems due to its flammable liquid classification (Flam. Liq. 3).

In case of skin contact with tetraethyl silicate, immediately remove contaminated clothing and wash the affected area with plenty of water. For eye contact, rinse immediately with water for at least 15 minutes and seek medical attention due to its eye irritant properties. If inhaled, move to fresh air immediately and seek medical advice if respiratory irritation occurs.

Tetraethyl silicate must be disposed of according to local and national hazardous waste regulations. As a flammable liquid with toxic properties, it cannot be disposed of in regular waste streams. Contact licensed hazardous waste disposal companies and follow all applicable environmental regulations for proper treatment and disposal of this chemical substance.

Tetraethyl silicate is classified under ADR as Class 3 (flammable liquids), Packing Group III. Transportation requires appropriate UN-approved packaging, proper labeling with GHS02 and GHS07 pictograms, and compliance with dangerous goods transport regulations. Vehicles must be equipped with appropriate safety equipment and documentation for hazardous material transport.

Tetraethyl silicate is subject to REACH regulation in Europe and must comply with CLP classification requirements. It carries hazard classifications including Flam. Liq. 3, Acute Tox. 4, STOT SE 3, and Eye Irrit. 2, with Warning signal word. It is not currently listed as a SVHC substance under REACH.

Tetraethyl silicate is available through OYSI, a European distributor of technical chemicals. As an established chemical supplier, OYSI can provide this organosilicon compound to industrial customers across Europe. Contact OYSI directly for availability, specifications, and ordering information for your specific application requirements.