Kinetic analysis and self-accelerating decomposition temperature (SADT) of β-nitroso-α-naphthol

To study the thermal hazard of β-nitroso-α-naphthol, both dynamic and isothermal tests were performed with a differential scanning calorimeter (DSC). The dynamic tests indicated that the initial decomposition temperature of β-nitroso-α-naphthol ranged from 153   °C to 173   °C. The interrupt-rescanning method verified the autocatalytic characteristic of β-nitroso-α-naphthol decomposition. DSC curves obtained at five constant temperatures confirmed that the decomposition of β-nitroso-α-naphthol was an autocatalytic reaction. Activation energy E was 149   ±   8   kJ   mol −1 calculated by Kissinger method. E values calculated by induction period method and isothermal method were in line with that obtained by Friedman method. On the basis of the kinetic analysis, the safety parameter SADT of β-nitroso-α-naphthol in 50   kg standard packaging was 81   °C based on Semenov model and 67   °C based on Frank-Kamenetskii model.