What is "trinitrotriazine"

Trinitrotriazine, or 2,4,6-trinitro-1,3,5-triazine, is a theoretical explosive compound. Synthesis of this compound has been elusive despite its simple structure, as conventional nitration of triazine becomes increasingly more difficult as more nitro groups are added. A successful route would more likely proceed by trimerisation of nitryl cyanide. The precursor, nitryl cyanide has finally been synthetized.

It has a perfect oxygen balance, potentially making it a very powerful explosive, though calculations predict it would be fairly unstable and inferior to the related compound 3,6-dinitro-1,2,4,5-tetrazine.