A method for preparing essentially pure 3,3'-diamino-4,4'-azoxyfurazan ("DAAF") that involves reacting an aqueous solution that includes 3,4-diaminofurazan ("DAF") with OXONE.TM. (i.e. 2KHSO.sub.5.KHSO.sub.4.K.sub.2SO.sub.4) in the presence of a chemical buffer or a material that produces a chemical buffer during the reaction between DAF and the OXONE.TM.. The essentially pure product particles can be used without further purification in preparing pressed articles of that consist of essentially pure DAAF. When sodium hypochlorite is used instead of OXONE, the product is 3,3'-diamino-4,4'-azofurazan ("DAAzF").
STATEMENT REGARDING FEDERAL RIGHTS
 This invention was made with government support under Contract No. DE-AC52-06NA25396 awarded by the U.S. Department of Energy awarded by the U.S. Department of Energy. The government has certain rights in the invention.