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Forum Description: Discuss the technical details of the preparation of drugs
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Old 05-19-2004, 05:59 PM   #1
TomDijon
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polar/non-polar extractions question
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when making extractions using this basic method, it's come to my attention that using naptha or lighter fluid for the nonpolar solvent can leave a scum of it's own. does anyone know how to obtain an easy alternative to this, either specific naptha types, other petroleum ether products that are purer, or whatever? i just don't want to end up smoking any of that shit, y'know?
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Old 05-19-2004, 11:57 PM   #2
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You can order pure solvents from a chemical supply house, or order them from the 'net. Of course they will be more pricy. I think it's "reagent grade" but i'm not sure, basically its what ppl use in labs (as opposed to industrial grade).
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Old 05-20-2004, 12:42 AM   #3
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Any OTC solvents you use should be tested by evaporating a sample on a glass plate and checking for residue. Ronsonol or Zippo brand lighter fluid, and Bestine brand rubber cement thinner are all good clean NP solvents in my experience.

The only reliable way to purify solvents like this is distillation. But unless you have the required equipment, this probably isn't an option for you.
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Old 05-21-2004, 02:49 PM   #4
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equipment haha

you better believe it.
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Old 05-23-2004, 12:18 AM   #5
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if you have disstillation glassware then just distill, you can check the various boiling points online via msds and probably a few stickys at www.the-hive.ws under newbee forum or www.rhodium.ws, if not you can use various solvents from the hardware store (vm&p naphta ime is usually pretty clean) like dliss said just do a quick evap. test
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Old 06-11-2004, 03:03 AM   #6
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Rhodium recommends using Coleman Fuel, stating that it's the cleanest OTC solvent.
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Old 06-11-2004, 03:09 AM   #7
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Coleman fuel contains a small amount of a greenish oil, presumably as a corrosion inhibitor. I wouldn't suggest using it for extraction purposes without distilling it first.

Of course, distilling highly flammable solvents is horribly dangerous without proper equipment and knowledge.....
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Old 06-12-2004, 06:07 AM   #8
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Don't use coleman fuel.

Ellis ain't kidding about the green.
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Old 06-29-2004, 04:32 PM   #9
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Wow, a post at 4:20. Yay.
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Old 07-14-2004, 11:37 PM   #10
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ok, i went out and got some ronsol lighter fluid, but it's got heptane in it as well as naptha. ellis, you're the expert, is it still usable?
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