A way to tell the difference between ammonium nitrate and urea
Hello, so I joined this forum today, also started home chemistry as a hobby recently  (However learning chemistry for 6 years now, as of today I am graduating, taking my exams next week). I really like to gain practical
knowledge.
So, the first material I tried acquiring, was Ammonium nitrate from a cold pack that was left in my home and unused. The thing is that i dissolved it
in water, filtered from anti cracking agent, and left for crystallization. So finally it crystallized. But I when I have read more about instant cold
packs, I found out, that there are two types: made from Ammonium nitrate or Urea. So the question is, how should I know which material I managed to
acquire? Is there a way to determine that? Thanks
P.S. Sorry for bad English.
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