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  • 1 Universidad de Sevilla Instituto de Ciencia de Materiales, Centro Mixto Consejo Superior de Investigaciones Científicas Apdo. 1115 41080 Sevilla Spain
  • | 2 Consejo Superior de Investigaciones Científicas Instituto de Recursos Naturales y Agrobiología Apdo. 1052 41080 Sevilla Spain
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Thermoanalytical study of the pesticide 3-amino-1,2,4-triazole (ATA) has been carried out, using simultaneous DTA-TG in nitrogen flow, in order to know its thermal behaviour and stability. These techniques have been further complemented using evolved gas analysis and mass spectroscopy (EGA-MS). Two different stages of ATA decomposition were observed: after the first decomposition step, a mixture of compounds is obtained, according to MS data, being the principal component a compound of molecular weight 126. It is formed by a first order reaction mechanism, according to the kinetic study, withEa=124±8 kJ·mol−1. The second decomposition step takes place about 735°C, with evolution of HCN and NH3, being the final weight loss 96%.

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