We need a pure copper phthalocyanine for our experiments. Of course, we can buy it from Sigma Aldrich, but this means we'll have to wait a while. In local area we can buy only dyes which are about 98% purity, which is not enough. Is there any fast and easy method to purify it in lab?

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    $\begingroup$ Did you consider sublimation in vacuum? This article: Journal of Materials Science, 1982, 17, 2781-2791 might give some directions. $\endgroup$ – Klaus-Dieter Warzecha Mar 20 '15 at 14:36
  • $\begingroup$ We have no vacuum equipment in our lab. $\endgroup$ – KOLANICH Mar 20 '15 at 14:48
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    $\begingroup$ Purifying phthalocyanines is a pain because even the substituted ones aren't very soluble in common solvents (e.g., for chromatography or recrystallization). I highly recommend sublimation. You don't need high vacuum. Do you have any way to provide reduced pressure? $\endgroup$ – Geoff Hutchison Mar 20 '15 at 15:07
  • $\begingroup$ Unfortunately, we don't have any vacuum equipment. But we have a furnace (not designed for vacuum). $\endgroup$ – KOLANICH Mar 20 '15 at 22:36
  • $\begingroup$ I doubt You will get some higher purity from Sigma Aldrich. Do they garantee some purity? $\endgroup$ – Georg Mar 21 '15 at 20:56

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