Ammonium nitrate, the product of the reaction between ammonia and nitric acid, is used in many different ways. It is most commonly used in agriculture as a high- nitrogen fertilizer. It is used as an oxidizing agent in explosives and is the main component of ANFO, a very popular explosive. Ammonium nitrate is used in instant cold packs, as hydrating the salt is an endothermic process. As well, it is used in the treatment of titanium ores and in solid- fuel rocket propellants, and in pyrotechnics.This reaction is quite significant to industry. If the reaction between ammonia and nitric acid did not exist, the fertilizing industry would probably not even exist. As well, we would not be able to make certain important explosives such as ANFO.