Editing Ammonia (section)

==== Stimulant ====
[[File:Meth ammonia tank Otley iowa.JPG|thumb|Anti-[[methamphetamine|meth]] sign on tank of anhydrous ammonia, [[Otley, Iowa]]. Anhydrous ammonia is a common farm fertiliser that is also a critical ingredient in making methamphetamine. In 2005, Iowa used grant money to provide thousands of locks to prevent criminals from gaining access to the tanks.<ref>{{Cite news|url=http://thegazette.com/2009/10/06/anhydrous-ammonia-tank-locks-have-flaws |title=Anhydrous ammonia tank locks have flaws|newspaper=Cedar Rapids Gazette|date=6 October 2009}}</ref>]]
Ammonia, as the vapour released by [[smelling salts]], has found significant use as a respiratory stimulant. Ammonia is commonly used in the illegal manufacture of [[methamphetamine]] through a [[Birch reduction]].<ref>{{cite web |url=http://www.illinoisattorneygeneral.gov/methnet/understandingmeth/basics.html |title=Illinois Attorney General &#124; Basic Understanding of Meth |publisher=Illinoisattorneygeneral.gov |access-date=21 May 2011 |archive-url=https://web.archive.org/web/20100910041147/http://www.illinoisattorneygeneral.gov/methnet/understandingmeth/basics.html |archive-date=10 September 2010 |url-status=dead}}</ref> The Birch method of making methamphetamine is dangerous because the alkali metal and liquid ammonia are both extremely reactive, and the temperature of liquid ammonia makes it susceptible to explosive boiling when reactants are added.<ref>{{Cite book|url=https://books.google.com/books?id=NnZ23IqU4SoC&q=ammonia+birch+method+danger&pg=PA759|title=Occupational, Industrial, and Environmental Toxicology|last=Greenberg|first=Michael I.|date=2003-01-01|publisher=Elsevier Health Sciences|isbn=978-0323013406|language=en}}</ref>