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To obtain a deeper understanding of the process involved in the synthesis of  N ‐nitrodiethanolamine dinitrate (DINA), in this work we carried out systematic studies on the transformation and stability of the  N ‐nitration liquid and DINA. The thermal decomposition processes and dynamic characteristics for both the  N ‐nitration liquid and DINA were carried out by thermal analysis methods and the mechanism for the decrease of stability of the  N ‐nitration liquid was proposed according to experimental results. Mechanical stimulation of the  N ‐nitration liquid and DINA were also studied by friction and impact sensitivity testing. The experimental results showed that the  N ‐nitration liquid is highly sensitive to temperature and can decompose easily when the reaction temperature increases. However, mechanical sensitivity of the  N ‐nitration was demonstrated to be much lower than that of DINA. Therefore, precise thermal control is the key factor to ensure safety during the preparation of DINA.

Transformation and Stability of N ‐Nitrodiethanolamine Dinitrate Nitration Liquid System under Thermal and Mechanical Stimulation