Yeah, ammonia is very common in industrial refrigeration, especially big specialized systems that need tons and tons of refrigerant, as illustrated by this famo

Yeah, ammonia is very common in industrial refrigeration, especially big specialized systems that need tons and tons of refrigerant, as illustrated by this famous accident in which 30,000 lb. of the stuff was released: https://www.csb.gov/millard-refrigerated-services-ammonia-release/ https://www.csb.gov/millard-refrigerated-services-ammonia-re...