Mixed with water it forms ammonium hydroxide, NH4OH, which is further diluted to make household ammonia.
I know it is used for a coolant, and hundreds of other uses in addition to the manufacture of fertilizer.
Nasty stuff, and under the right conditions.....highly explosive. This I know because we once inadvertently left a couple cars of it sitting in the hot sun over a weekend on a siding in the yard...The vents on the tank had to relieve some of the pressure and all hell broke loose with the EPA and local authorities...
Not one of my best memories of decades gone by....