The influence of iridium(III) chloride (Ir(III)] for the oxidation of ethylenediamine (EDA) by chloramine-T (CAT) in acidic medium at 308K by the kinetic study is reported here. The results showed a first-order with respect to CAT. The Ir(III) chloride and EDA followed first-order kinetics at lower concentration range, but tends to zero order at higher concentration. The rates decreased with increase in the proton concentration. Chloride ion, ionic strength (1) and dielectric constant of the medium (D) had no significant effect on the rates. Activation parameters of the reactions were determined by studying the reaction at different temperatures (298-313K). A plausible reaction scheme of the oxidation of EDA by CAT in presence of Ir(III) chloride was proposed, which was found to be in agreement with the rate law and the reaction stoichiometry. The determined stoichiometry ratio was 1:2 and the oxidation product was glycine.