The fused-ring heterocycle 4-amino-3,7,8-trinitropyrazolo-[5,1-c][1,2,4]triazine (PTX) has promising explosive properties. The Cheetah thermochemical code used its calculated standard enthalpy of formation and its measured crystal density of 1.946 g cm−3 to predict HMX-like explosive performance, while measurements of its thermal stability, sensitivity to impact, friction, and spark showed greater safety margins.
M. C. Schulze, B. L. Scott and D. E. Chavez, J. Mater. Chem. A, 2015, 3, 17963 DOI: 10.1039/C5TA05291B
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