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Precipitation in used Toluene bottles useful? Options
 
merkin
#1 Posted : 7/6/2018 11:07:14 AM

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I kept the used solvent after a FASA extraction on some MHRB done with Toluene thinking I would clean and reuse it. Never got around to that but noticed now some crystals on the sides and bottoms of the bottles. As I am not a chemist I was wondering if this might be some spice and how would I be able to test for that? I was thinking scraping it loose and then washing with some FASA. The one on the left is whitish while the others are definitely yellow and consistent with a more "jungle" result from using Toluene as the solvent. The whitish precipitate is in a drier bottle and it definitely has some spice aroma. The other two have just been decanted so the Toluene/Acetone smell is too strong to tell.

Any idea on how to confirm if this is indeed spice and if so how to best retrieve it?

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null24
#2 Posted : 7/6/2018 7:43:37 PM

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Without access to reagents or chromatography,burn, melt and smell tests?

Retrieve via solvent, freeze precip or evap, yes? Then a mini a/b re-x?

EDIT: FASA would result in a salt precipitating, right? Then retrieval would be a mini a/b that would in effect clean and re-x? I have no experience with the FASA chemistry route.
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merkin
#3 Posted : 7/7/2018 12:55:00 PM

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Yes, well obviously none of that gear! I was thinking more on the lines of logic - as in: what else would be likely to precipitate as little bundles of crystals from that solvent given its use in the FASA process? I scraped up the one on the left and cleaned it with acetone and its pretty identical in look and feel to the rest of the d-fumarate. I will store separately and bioassay - its only just over .1g. The bigger yellow crystals definitely have both a spice look and smell so I will keep them separate.
 
 
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