Dinitroguanidine is a product of nitroguandine nitration with nitric acid and oleum. Ammonium-dinitroguandine (ADNQ) was synthesized by 1,2- nitroguanidine and ammonium carbonate. Using 1,3-dichloro-2-nitrazapropane and potassium dinitroguanidine as starting materials, 1,7-diamino-1,7-dinitrimino-2,4,6-triazaheptane (APX) was synthesized by condensation with sodium iodide and 18-crown-6. Potassium dinitroguanidine was readily available starting from 1,2-dinitroguanidine and potassium bicarbonate by the reaction of acid-base neutralization. The overall yield is 75%. Both compounds and their intermediates were characterized by IR, ¹H NMR and elemental analysis. 