Trinitromethyl-triazolone (TNMTO): a highly dense oxidizer.

A scalable synthesis of 5-(trinitromethyl)-2,4-dihydro-3 H -1,2,4-triazol-3-one ( TNMTO ) is possible from commercially available 2-methylpyrimidine-4,6-diol. It exhibits high density (1.90 g cm -3 ) with comparably low thermal stability ( T d = 80 °C) and positive oxygen balance (OB co = 20.51%, OB CO 2 = 0.0%). TNMTO has an attractive combination of detonation properties ( P = 35.01 GPa, D = 8997 ms -1 ) and propulsive properties ( I sp(neat) = 251.85 s, ρI sp(neat) = 478.52 gs cm -3 , ). These are superior to ammonium dinitroamide (ADN), 2,2,2-tetranitroacetimidic acid (TNAA) and ammonium perchlorate (AP), making it a potential green oxidizer in solid rocket propulsion.