1-Chloroethyl chloroformate (chemical formula: C<sub>3</sub>H<sub>4</sub>Cl<sub>2</sub>O<sub>2</sub>) has a structure consisting of ethyl chloroformate with a chloro group as substituent on the ethyl group and has two enantiomeric forms. It can be used for N-dealkylation of tertiary amines.
1-Chloroethyl chloroformate can be manufactured by the reaction of acetaldehyde with phosgene in the presence of benzyltributylammonium chloride. or various other catatysts.
1-Chloroethyl chloroformate is a useful reagent, for example for the N-dealkylation of tertiary amines, especially their demethylation to produce drug metabolites for forensic investigations.