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Ammonia wash?

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Rothko

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Mar 4, 2011
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Hello friends,

I'm thinking of doing an ammonia wash, as it seems to be the quickest route to purity for me. I have seen posts of people reporting big losses with ammonia, but is it the case that if the ammonia is ice cold it shouldn't melt the crystals, I am able to chill the ammonia to -40C which should help.

I would like to hear the arguments for and against. Are there any people out there using ammonia every time?
 

Never wash freebase crystals like that, its a wasteful proceedure that makes no sense since it only superficially washes the crystals (+ loss of yield). Where did you get that idea of ammonia from? We've been warning people for years against this. A wash should be done when the alkaloid is dissolved in an appropriate solvent. Check link above.
 
is it really necessary to wash at all? I mean, can SWIM just evap and go form there? I realize there are benefits, but other than just having a harsher uptake, is there really anything that you REALLY need to be worried about if bypassing Re-X? Again, I understand there are benefits, but is it absolutely necessary if the end product looks good to go?
 
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