The O ethyldichlorothiophosphate has been synthesized from thiophosphoryl chloride and ethyl alcohol. The reaction order,preexponential factor, activation energy and rate constant of the reaction are determined. At the condition of n (ethyl alcohol)∶ n (thiophosphoryl chloride)=3∶1, 10 ℃ and 2 h, the reaction gave O ethyldichlorothiophosphate in yield more than 99 7%.
