Kinetics of exothermal decomposition of 2-nitrophenylhydrazine (2-NPH) and 4-nitrophenylhydrazine (4-NPH) was investigated
by differential scanning calorimetry. The isoconversional methods, Friedman and Flynn-Wall-Ozawa, were applied to determine
the activation parameters from the common analysis of multiple curves measured at different heating rates. For the processes
involving two-step reactions the multivariate non-linear regression was used. A good agreement between the experimental and
the fitted data was found.