Synthesis and Properties of 2,6-Diamino-3,5-dinitropyridine-1-oxide

2,6-Diamino-3,5-dinitropyridine-1-oxide(ANPyO)was synthesized using 2,6-diaminopyridine as the starting materials in two steps including nitration and N-oxidation.The yields of nitration reaction and N-oxidation reaction are 90% and 84%,the over-all yield of ANPyO is 75%,which indicate that it is a better method than the method Ritter-Licht reported(45%).The detonation velocity(7000 m·s-1,1.50 g·cm-3),exthermic peak(365 ℃)on the DSC curve,5 s delay explosion point(400 ℃),friction sensitivity(360 N)and impact sensitivity(250 cm)for ANPyO were studied.Results show that ANPyO and 1,3,5-triamino-2,4,6-trinitrobenzene(TATB)are about equal in the detonation and safety property,so ANPyO will be a new promising insensitive explosives in the energetic materials field.