Ammonia
Sorry, this answer is incorrect. Ammonia is the principle gas produced from urine decay and has a characteristic pungent odor. Industrially, it is mainly used in the production of fertilizers, explosives, and polymers. It is also an ingredient in certain household glass cleaners. Ammonia is produced by catalytically reacting hydrogen and nitrogen. This reaction is called the Haber-Bosch process and was awarded the Nobel prize in Chemistry in 1918.