Diamino-2,2,4,4,6,6-hexanitrodiphenyl

3 -Diamino-2,2, 4,4 6,6 -hexanitrodiphenyl (DIPAM) [Structure (2.30)] is extremely insensitive to electrostatic discharge, requiring more than 32 kj for initiation. In addition, it has good thermal stability (m.p. ca. 304 °C) and has been used to achieve stage separation in space rockets and for seismic experiments on the moon in a manner similar to HNS [74]. 

NS-Tripicrylmelamine or 2,4,6-Tris(picrylamino)-l,3,5-triazine Series of Explosives 

data show that II is more thermally stable than I. However, thermal stability decreases with further substitution of C-nitro for heterocyclic nitrogen to give III and IV in spite of increased resonance stabilization of the parent ring. The decrease in thermal stability appears to be the result of increased steric crowding about the ring as we proceed from II to IV. This is supported by the fact that when the bulky 4-picrylamino group is removed from III, it yields PYX, one of the most thermally stable explosives [78]. 

Hercules Inc., USA manufactures TPM on a large scale for about the same cost as hexahydro-1,3,5-trinitro-1,3,5-triazine or RDX. China is also reported to have a low-cost newer manufacturing technology for TPM but has a limited production capability. l,3,5-Trinitro-2,4,6-tripicrylaminobenzene (IV) is a readily-detonatable 

6- trinitrobenzene (sym.-TCTNB) and picramide in the presence of activated copper powder. Its m.p. is only 234 °C but it is still used in booster cup or bridgewire detonators for example, for oil-well perforation [79, 80]. 

---

Hexanitroshlbene (HNS) has been reported for use in achieving stage separation in space rockets and also as a component of heat-resistant compositions employed in the Apollo spaceship and for seismic experiments on the moon [107]. Similar to HNS, 3,3 -diamino-2,2, 4,4, 6,6 -hexanitrodiphenyl (DIPAM) has also been reported for such applications [108]. 

---