The thermal behavior, mechanism and kinetic parameters of the exothermic first-stage decomposition reaction of the title compound in a temperature-programmed mode have been investigated by means of DSC, TG-DTG and IR. The reaction mechanism was proposed. The empirical kinetic model functions in differential form, apparent activation energy (E a) and pre-exponential factor (A) of this reaction are (1-α) -1.119, 211.3 kJ/mol and 10 20.2 s -1, respectively. The critical temperature of thermal explosion of the compound is 202.2 ℃. The values of ΔS ≠, ΔH ≠ and ΔG ≠ of this reaction are 143.8 J·mol -1·K -1, 208.7 kJ/mol and 141.7 kJ/mol, respectively. The thermal behavior, mechanism and kinetic parameters of the exothermic first-stage decomposition reaction of the title compound in a temperature-programmed mode have been investigated by means of DSC, TG-DTG and IR. The empirical kinetic model was proposed. The empirical kinetic model functions in differential form, apparent activation energy (E a) and pre-exponential factor (A) of this reaction are (1-α) -1.119, 211.3 kJ / mol and 10 20.2 s -1, respectively. The values ​​of ΔS ≠, ΔH ≠ and ΔG ≠ of this reaction are 143.8 J · mol -1 · K -1, 208.7 kJ / mol and 141.7 kJ / mol, respectively.