A novel tetrazole-based lead(II) complex, [PbL(H2O)] (1) [H2L = N-(1-carboxymethyltetrazole-5-yl)-N-(2'-carboxymethyltetrazole-5'-yl)amine], was prepared by solvothermal reaction. IR, single crystal X-ray diffraction (XRD), elemental analysis and thermogravimetric analysis (TGA) were used to characterize the structure of 1. Complex 1 shows a 2D network. Differential Scanning Calorimetry (DSC) was used to study the kinetic parameters and thermal hazards of 1. Starink method was adopted for isoconversional approach to determine the activation energy during the decomposition of 1. An improved method developed from Malek's was employed in order to figure out the most probable reaction model for the decomposition process. Kinetic analysis reveals that decomposition of 1 conforms to the S-B function. Self-accelerating decomposition temperature (SADT) was also determined, indicating the temperature range for safe transportation of 1.