A high density pyrazolo-triazine explosive (PTX)

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.