Overview
Ethyl thioacetate (C4H8OS) is a sulfur-containing ester with a sharp, garlic-like odor. It serves as a versatile intermediate in organic synthesis, particularly for introducing thiol groups. Industrially, it is valued for its role in producing agrochemicals, pharmaceuticals, and specialty flavors. The compound was first synthesized in the late 19th century and remains a niche but essential chemical in fine chemistry. Its reactivity with nucleophiles makes it useful for constructing sulfur-bearing molecular frameworks.
Physical and Chemical Properties
As a low-viscosity liquid, ethyl thioacetate exhibits moderate volatility (boiling point 115-117°C) and a density slightly higher than water. Its sulfur atom confers polarity, enabling solubility in common organic solvents but limited miscibility with water (0.5 g/100 mL at 20°C). Key reactivity includes hydrolysis to acetic acid and ethanethiol under acidic/alkaline conditions. It undergoes nucleophilic acyl substitution reactions, making it valuable for synthesizing thioesters and thiols. The compound is thermally stable below 200°C but decomposes to toxic gases (SOx) upon combustion.
Main Applications
In organic synthesis, ethyl thioacetate acts as a masked thiol equivalent for creating sulfur-containing heterocycles and pharmaceutical intermediates. It is employed in the production of cysteine derivatives and certain ACE inhibitors. The flavor industry utilizes diluted forms (≤10 ppm) to impart roasted, meaty notes in processed foods. Industrial applications include corrosion inhibitor formulations and vulcanization accelerators for rubber. Emerging uses involve polymer modification and ligand synthesis for metal catalysis.
Safety and Storage
Classified as flammable (Flash point 24°C) and harmful, ethyl thioacetate requires storage in UN-approved containers under inert gas (N2) to prevent oxidation. Secondary containment is recommended due to its penetrating odor and potential to corrode certain metals. Handling mandates fume hoods and chemical-resistant PPE (nitrile gloves, face shields). Spills should be neutralized with sodium hypochlorite solution. Transportation typically falls under UN1993 (Flammable liquids, n.o.s., Packing Group III).
B2B Procurement Guide
Industrial buyers should prioritize suppliers with batch-specific GC-MS analysis (purity ≥98%) and ISO 9001 certification. Key due diligence points include verification of proper inhibitor content (e.g., 0.1% hydroquinone) to prevent polymerization during storage. Bulk shipments (200kg drums) typically offer 10-15% cost savings versus small batches. Consider regional logistics – some jurisdictions classify this chemical as a controlled substance requiring special permits. MOQs commonly start at 25kg for specialty chemical distributors.
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