Ethyl orthoformate

Chemically, it is the triethyl ester of orthoformic acid and serves as an efficient C1 (one-carbon) building block in organic synthesis. Its primary function is to introduce formyl or ethoxy-substituted intermediates under acidic conditions. Like all orthoesters, it readily hydrolyzes in the presence of water, producing ethanol and formate derivatives, which means dry handling is non-negotiable. Ethyl orthoformate is a colorless, volatile, moisture-sensitive organic liquid used as a synthetic reagent and intermediate in chemical and pharmaceutical manufacturing.