Overview
Hexabutylditin (C24H54Sn2) is a specialized organotin compound primarily utilized in synthetic chemistry and industrial catalysis. It consists of two tributyltin groups linked by a tin-tin bond, making it a versatile reagent for radical reactions and polymerizations. As a member of the organotin family, it exhibits high reactivity due to the weak Sn-Sn bond, which can be cleaved under mild conditions. Its applications span pharmaceuticals, agrochemicals, and material science, though its use is regulated due to environmental and toxicity concerns.
Physical and Chemical Properties
Hexabutylditin is a colorless to pale yellow liquid at room temperature with a density of approximately 1.17 g/cm³. It decomposes before reaching a melting point and boils at 120-125°C under reduced pressure (0.1 mmHg). The compound is soluble in most organic solvents, such as ethanol, ether, and toluene, but immiscible with water. Its key chemical property is the labile Sn-Sn bond, which facilitates its role as a free-radical initiator or reducing agent in reactions like the Stille coupling.
Main Applications
Hexabutylditin is predominantly employed as a catalyst or intermediate in organic synthesis, including the production of polymers, pharmaceuticals, and fine chemicals. It is particularly valued in Stille cross-coupling reactions to form carbon-carbon bonds. In industrial settings, it serves as a stabilizer for PVC and a biocide in antifouling paints (though the latter use is declining due to environmental regulations). Niche applications include its use in semiconductor manufacturing and as a reducing agent in specialized redox reactions.
Safety and Storage
Hexabutylditin is classified as toxic and corrosive. Exposure can cause severe skin burns, eye damage, and respiratory irritation. Always use gloves, goggles, and a fume hood when handling. Store in tightly sealed containers under inert gas (e.g., nitrogen) to prevent oxidation. Keep away from heat, open flames, and oxidizing agents. Dispose of waste in compliance with local regulations for organotin compounds, as they are persistent environmental pollutants.
B2B Procurement Guide
When sourcing hexabutylditin, prioritize suppliers with ISO 9001 certification and detailed product specifications. Key procurement criteria include purity (typically ≥95%), batch consistency, and packaging (e.g., amber glass bottles or steel drums for bulk orders). Due to its toxicity, ensure suppliers provide Safety Data Sheets (SDS) and comply with transport regulations (e.g., UN/ADR for hazardous materials). For large-scale orders, negotiate incoterms that account for specialized logistics, such as temperature-controlled shipping.
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