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Author: Subject: Recrystallizing using impure solvent
cnidocyte
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[*] posted on 29-7-2010 at 03:31
Recrystallizing using impure solvent


I don't have a distillation kit to purify solvents with but in the case of solvents like methylated spirit (95% ethanol I believe), it would still work fine as a recrystallization solvent wouldn't it?

[Edited on 29-7-2010 by cnidocyte]
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[*] posted on 31-7-2010 at 16:40


it depends on what you are trying to re-crystallize.
Sometimes crystals won't form- only an oily layer will appear.
Sometimes whatever forms will be more sensitive to, say, detonation, than normal.......
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[*] posted on 1-8-2010 at 00:42


For almost all situations, methylated spirit will work fine. Before using it, check to make sure it evaporates without leaving any residue. If it leaves residue, distill it, or use another brand of methylated spirit (everything I have encountered commercially evaporates w/o leaving residue).





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