vinny111 - 8-6-2015 at 11:54
hi i recently got ammonuim nitrate out of a few cold packs. i tested it by using lye mixed with this an and water and it produced ammonia gas. here is
the thing it produces clumps but when i go to dry it in oven it melts and turns into water again. the oven temp is at 150 degrees F so its not
decomping. why is it doing this? please let me know thanks 
Loptr - 8-6-2015 at 12:36
It doesn't decompose until well over 200C. You might be looking at either melted ammonium nitrate, or ammonium nitrate dissolved in its own water of
hydration. However, the melting point is 337.3°F, which you are no where near, so I would assume its the latter, in which case keep heating.
http://www.sciencemadness.org/talk/viewthread.php?tid=721
vinny111 - 8-6-2015 at 13:12
ok thanks i wasnt shure what had happened lol thanks very much
nitro-genes - 8-6-2015 at 13:14
There is still too much water present, 10% water and ammonium nitrate forms an eutectic, melting at around 100 deg C. Just needs to dry longer...
vinny111 - 8-6-2015 at 13:15
ok ill keep heating it boiling out water how long does one boil?
aga - 8-6-2015 at 13:25
until it's dry, or starts to decompose, then turn off the heat.
No, you can't leave it and go do something else in the meantime.
vinny111 - 8-6-2015 at 13:41
ok see i boiled it down til it was half its volume 600 ml and then cooled it in freezer to crystallize. i didnt know if an will boil right out with
the water. im new so dont judge me 