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Purifiying solution of ammonium nitrate.

  1. May 30, 2013 #1
    I've made up a solution of ammonium nitrate from an instant cold pack, however the solution I've made is slightly cloudy and a dull yellow color. I've put it through a coffee filter once but it hasn't really helped. Is there anyway to purify my solution?
  2. jcsd
  3. May 30, 2013 #2


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    Staff: Mentor

    This is not a safe compound to work with. Crystallization could work.
  4. May 30, 2013 #3
    Thanks for the quick reply! What kind of dangers are there when dealing with ammonium nitrate? and by Crystallization are you refering to Recrystallization as described here? http://en.wikipedia.org/wiki/Recrystallization_(chemistry [Broken]).
    Last edited by a moderator: May 6, 2017
  5. May 30, 2013 #4


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    Staff: Mentor

    Do you remember April Texas factory explosion? It was the ammonium nitrate. It can explode even when dissolved. Sure, it requires a hot, concentrated solution - but heating and concentrating is what we usually do during crystallization.

    And yes, recrystallization in wikipedia is more or less what I am referring to.
  6. May 30, 2013 #5


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    Aug 7, 1959. 1:15am 7 tons of ammonium nitrate blew up in Roseburg Or, my home town. 14 killed, 6 blocks of downtown destroyed.

    Texas City ~1953 a shipload of Ammonium nitrate blew up killing hundreds and destroyed a large area.

    this is dangerous stuff, do not "play" with large quantities.
  7. May 30, 2013 #6
    This is ~ 100 grams and I'll be sure to do it outside.
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