In recent years, there has been a considerable interest in the development of novel type of high performance propellants for use in solid rocket motors. Ammonium salt of dinitramidic acid NH4N(NO2)(2) (ADN) has attracted wide interest as a potentially useful energetic oxidizer for rocket propellants because of its clean and environment-friendly exhaust products during burning. ADN contains one N-(NO2)(2) group and its synthesis requires new type of N-nitration. The present paper reviews the general synthetic methods used for the synthesis of inorganic, organic and metal dinitramide salts and their properties, with a special emphasis on ammonium dinitramide. The salient features with reference to the extent of conversion and ease of separation of the products of the various synthetic methodologies are also addressed.