Overview
Potassium ethoxide (C2H5OK) is an alkoxide derived from ethanol and potassium. It is a strong base and nucleophile, widely used in organic synthesis for deprotonation and condensation reactions. Due to its high reactivity, it is typically handled under anhydrous conditions. The compound is commercially available as a solid or as a solution in ethanol. Its applications span pharmaceuticals, agrochemicals, and specialty chemical manufacturing, where it acts as a catalyst or intermediate.
Physical and Chemical Properties
Potassium ethoxide appears as a white to off-white powder or solid. It is highly hygroscopic and reacts violently with water, releasing flammable gases. The compound is soluble in ethanol but decomposes upon exposure to moisture or acids. Its strong basicity (pKa of ethanol ~16) makes it useful for deprotonating weak acids in organic reactions. The molecular weight is 84.16 g/mol, and it decomposes at temperatures around 250°C, precluding a distinct boiling point.
Main Applications
In pharmaceuticals, potassium ethoxide is employed in the synthesis of active pharmaceutical ingredients (APIs) through alkylation or condensation reactions. It also serves as a catalyst in esterification and transesterification processes. The agrochemical industry uses it to produce pesticides and herbicides. Additionally, it is utilized in the preparation of specialty chemicals, such as surfactants and polymers, where its nucleophilic properties are leveraged.
Safety and Storage
Potassium ethoxide poses significant hazards: it is corrosive, flammable, and reacts violently with water, acids, and oxidizing agents. Proper PPE (gloves, goggles, lab coat) and inert handling conditions (e.g., glove box) are mandatory. Storage requires airtight containers under inert gas (nitrogen/argon) in a cool, dry place. Spills must be neutralized with dry sand or alcohol-resistant foam, never water. Always consult SDS before use.
B2B Procurement Guide
When procuring potassium ethoxide, prioritize suppliers with ISO certification and proven expertise in handling reactive chemicals. Verify CAS number (917-58-8) and purity (typically 95-99%). Bulk purchases (25 kg drums) may reduce costs, but ensure proper storage facilities. Request COA (Certificate of Analysis) and SDS. For logistics, choose carriers experienced in hazardous material transport to mitigate risks.
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