Overview
Ethyl(trimethylsilyl)acetate is an organosilicon ester with the formula C7H16O2Si. It serves as a versatile reagent in organic chemistry, particularly for introducing the trimethylsilyl (TMS) group into molecules. The compound is valued for its role in protecting functional groups and facilitating specific synthetic pathways. As a moisture-sensitive liquid, it requires careful handling under inert conditions. Its reactivity makes it useful in pharmaceuticals, agrochemicals, and advanced material synthesis, though commercial availability is often limited to specialty chemical suppliers.
Physical and Chemical Properties
The compound is a colorless to pale yellow liquid with a characteristic ester-like odor. Its low density (~0.89 g/cm³) and moderate boiling point (160-162°C) make it suitable for reactions under reflux conditions. It is highly soluble in common organic solvents but reacts violently with water, releasing acetic acid and trimethylsilanol. Key chemical properties include its role as a silylating agent, where it transfers the TMS group to nucleophiles like alcohols or amines. This reactivity is exploited in protecting-group strategies and catalysis. Thermal stability is moderate, with decomposition observed above 200°C.
Main Applications
In pharmaceuticals, ethyl(trimethylsilyl)acetate is used to synthesize silicon-containing drug candidates, particularly in prodrug formulations or to modify pharmacokinetics. It also acts as a precursor for silicone polymers with tailored properties. The compound finds niche use in agrochemicals for creating silylated intermediates that enhance bioavailability. Research applications include asymmetric synthesis and materials science, where it modifies surface properties of nanoparticles or polymers. Industrial adoption remains limited due to cost and handling challenges.
Safety and Storage
As a flammable and moisture-sensitive material, storage requires inert atmosphere packaging (e.g., nitrogen-purged bottles) and desiccants. Containers should be kept tightly sealed at temperatures below 25°C, away from oxidizers and moisture sources. Personal protective equipment (PPE) like nitrile gloves and goggles is mandatory during handling. Spills should be neutralized with dry sand or inert absorbents, never water. Ventilation is critical to prevent vapor accumulation, which may form explosive mixtures with air.
B2B Procurement Guide
Buyers should prioritize suppliers with ISO-certified production facilities, as impurities (e.g., chlorides) can affect reactivity. Technical specifications must include purity (≥98%), water content (<0.1%), and residual solvent levels. Batch-specific COA (Certificate of Analysis) is essential. Lead times may extend to 4-8 weeks for custom quantities. Consider multi-kilogram orders to reduce per-unit costs, but validate storage capabilities first. Regional regulations (e.g., REACH, TSCA) may require special permits for transport due to flammability hazards.
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