Tetraethyl silicate

Tetraethyl silicate is an organosilicon compound with the molecular formula C8H20O4Si and CAS number 78-10-4. It appears as a colorless liquid with a molecular weight of 208.33 g/mol. This silicon ester is classified as a flammable liquid with moderate toxicity and eye irritation properties. It is widely used in industrial applications as a silica source and cross-linking agent in various chemical processes.

Tetraethyl silicate is a colorless, transparent liquid with a characteristic mild odor. It has a molecular weight of 208.33 g/mol and is soluble in most organic solvents but hydrolyzes slowly in water to form silicic acid and ethanol. The compound exhibits moderate volatility and is classified as a Category 3 flammable liquid, indicating it has a flash point above 23°C but below 60°C.

Tetraethyl silicate is primarily used as a precursor for silica production in sol-gel processes and as a cross-linking agent in silicone polymer manufacturing. It serves as a binder in investment casting, a consolidant for stone and concrete preservation, and a source of silica in the production of optical fibers and electronic components. Additionally, it is utilized in coatings, adhesives, and as a stabilizer in various industrial formulations.

Tetraethyl silicate requires careful handling due to its flammable and toxic properties. Use appropriate personal protective equipment including safety goggles, chemical-resistant gloves, and protective clothing. Ensure adequate ventilation to prevent vapor accumulation and avoid ignition sources. Handle in well-ventilated areas away from heat, sparks, and flames. The substance can cause eye irritation and respiratory effects, so avoid inhalation and direct contact with skin and eyes.

Tetraethyl silicate should be stored in tightly sealed containers in a cool, dry, well-ventilated area away from heat sources, ignition sources, and direct sunlight. Keep containers upright and ensure proper grounding to prevent static electricity buildup. Store separately from strong oxidizers, acids, and water to prevent unwanted reactions. Maintain storage temperature below 25°C and ensure fire suppression systems are available in storage areas.

In case of skin contact with tetraethyl silicate, immediately remove contaminated clothing and wash the affected area with plenty of soap and water for at least 15 minutes. For eye contact, rinse immediately with clean water for at least 15 minutes and seek medical attention. If inhaled, move to fresh air immediately. If swallowed, do not induce vomiting and seek immediate medical attention. Always consult a physician in case of exposure.

Tetraethyl silicate must be disposed of as hazardous waste in accordance with local, national, and EU waste regulations. Do not discharge into sewers, waterways, or soil. Contact licensed waste disposal companies for proper treatment and disposal. Small quantities can be neutralized through controlled hydrolysis, but this should only be performed by trained personnel. Always follow local environmental regulations and obtain proper waste codes for disposal documentation.

Tetraethyl silicate is classified under ADR as Class 3 (flammable liquids), Packing Group III, indicating moderate danger during transport. It must be packaged in UN-approved containers with proper labeling including GHS02 and GHS07 pictograms and 'Warning' signal word. Transport vehicles must carry appropriate fire extinguishing equipment and emergency information. Drivers require ADR training and vehicles must display proper hazard identification numbers and placards.

Tetraethyl silicate is subject to EU REACH regulation requiring registration for quantities above one tonne per year. It is classified under CLP regulation with hazard classes including Flammable Liquid 3, Acute Toxicity 4, STOT SE 3, and Eye Irritation 2. It is not currently listed as a SVHC substance. Users must comply with workplace exposure limits, safety data sheet requirements, and proper labeling according to GHS standards.

Tetraethyl silicate is available through OYSI, a specialized European distributor of technical chemicals. OYSI supplies high-quality tetraethyl silicate with proper documentation including safety data sheets, certificates of analysis, and regulatory compliance information. As a professional chemical distributor, OYSI ensures reliable supply chains and technical support for industrial customers across Europe requiring this specialized organosilicon compound for their manufacturing processes.