jamit
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ammonium thiocyanate
I was able to acquire an old bottle of ammonium thiocyanate. the only problem is that the chemical has degraded a bit, at least that's what i
think... the color is no longer a white power but "yellowish-red". when I put it into solution, it is red.
Could this be because of iron contamination? I will attempt to recrystallize it but I'm not sure what contamination it could be. Any help on what
happened to the original chemical, ammonium thiocyanate?
I will try recrystallization to recover the original chemical.
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fredsci93
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It could be sulfides and poly sulfides due to degradation of the thiocyanate (SCN- + O2 ---> CO2 + 1/2N2 + S- and other more complex reactions) in
either case a recrystallisation should clean it up.
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woelen
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Keep in mind that recrystallization of ammonium thiocyanate is very difficult. The chemical is really hygroscopic and once you have it dissolved in
water, you will have a hard time getting it dry again. You most likely need vacuum over H2SO4 or NaOH to get it dry again.
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