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25X-NBOMe Recrystallisation Solvent

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PurpleMonkey

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Sep 9, 2012
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Does anyone have any experience recrystallising any of the NBOMe's? I have some dirty looking stuff here and want to recrystallise it, I seem to remember reading Acetone was good but I can't be sure. If anyone has any input that would be much appreciated otherwise I'll just have to do a bit of trial and error. ;)
 
I think you miss the idea of recrystallizing. You need to clean the solvent as recrystallizing will only allow you to grow larger crystals from whatever is in there. Nothing stops the crystals from being impure.

I know when I wanted to clean my unwashed DMT I would dissolve my freebase DMT into a non polar solvent that separated from water, like naptha, and than mixed a dmt saturated solution of naptha with a sodium carbonate (Washing soda) solution together and than separated the naptha off and after filtering it through a coffee filter to remove and possible sodium carbonate I would let it slowly evaporate to let the crystals grow. The slower it evaporates as it is left still the bigger the crystals would grow.

I dunno if it will apply to 25i-nbome... Probably, but maybe not due to the complex compound structure. Either way I would not know why you would want big crystals for this particular compound... Although you did not ask for that.

Edit: To the person below are you kidding me? Recrystallizing is usually a step in crystal growing and you are right that it does slightly clean it by leaving behind insoluble impurities. Still you will not get them all out without filtering the insoluble material out at least if not do a wash with two layer of solvents where one solvent collects the impurities and one collects the compound you want. Of course you want the solvent that contains the compound you want to be able to evaporate to leave behind what was saturated in it. Cleaning is a whole other level of procedure compared to recrystallizing and crystal growing.
 
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From what I understand about recrystallisation is that it is a purifying technique. You dissolve the compound in a solvent that has little solubility at room temp and near zero solubility and freezer temp but is soluble when heated. Once the compound has gone into solution at that elevated temperature you then slowly cool it down and crystal start to grow. The idea is that the impurities won't be soluble in the solvent and the slower you cool down the solvent the bigger the crystals will grow and the less likely they will be to trap the impurities back in them. At no point do you evaporate the solvent, you simply remove the crystals by filtration.

I have experience with recrystallisation with DMT by using heptane. What you describe is not a recrystallisation though, you are simply growing crystals. As if you are evaporating all the naphtha again, inevitably all the impurities will still be in your final product.
 
I honestly wouldn't know what solvent to use. It would of course depend on whether you have the salt or the freebase.

For the freebase perhaps ether in pentane/hexane/heptane? And for the salt maybe acetone or acetone/alcohol.
 
@bayhead415 check the link below if you want to learn about recrystallisation as a PURIFYING technique. I found it quite useful.

hxxp://www.erowid.org/archive/rhodium/chemistry/equipment/recrystallization.html
 
your best bet would be 90%+ etoh. however, its likely that the impurities are soluble in water or alcohol as well, so you may not gain any cleaning, just a re-x from it.

hot etoh will take on >40mg/ml, and keep it once it cools back down. as the alcohol evaporates youll get cubic crystals similar to how salt forms
 
Thanks for your input. I'll give it a try and see what happens anyway. Can you recommend any other purifying techniques that may help? Other than anything too technical like chromatography. This stuff isn't that dirty just a tan kinda colour, other stuff I've had before has been pretty much white.
 
There's no way for a layman t o purify compounds when they don't know what the impurities consist of.

Just because your product is tan does not mean it is "dirty", my advice is to leave it be.
 
The most common impurity in 25X-NBOMEs is the parent 2C-X but at NBOME doses it will not be noticeable. The 2C-X hydrochloride is less soluble in organic solvents than the NBOMe and will most likelyjust co-crystallize with the NBOMe. If you have colored impurities they can usually be removed by recrystallization from IPA or a mixture of IPA and heptane/petrol ether.
 
PurpleMonkey said:
@bayhead415 check the link below if you want to learn about recrystallisation as a PURIFYING technique. I found it quite useful.

hxxp://www.erowid.org/archive/rhodium/chemistry/equipment/recrystallization.html
Click to expand...
I was just trying to point out recrystallizing is a VERY primitive version of cleaning... It may help and not only leave behind some impurities, but also crystallize the nbome in piles and impurities in other piles (not like 2 separate piles, but piles of different sizes that are hard to differentiate) as like molecules crystallize are more likely to crystallize together. Still you will have impurities in the end product unless you filter out the insoluble materials and will have much better results if you have another solvent that expels the nbome into the solvent that evaporates, but also pulls in the impurities that you do not want. Although to do what I am thinking of you need to know the exact compound components of said powder to be able to do and be sure of removing the impurities while risking adding it to a solvent you might not evaporate fully.

I do not need an explanation of recrystalizations as I have studied it quite a bit even though I am not an expert.

Edit: Also remember H2O (water) is a solvent as well.
 
I guess it's not entirely necessary I recrystallise it, really I just want to practice the recrystallisation technique in general. If I do do a recrystallisation I'll be sure to filter it through as well. I'll post my results if I get round to doing it. Thanks for your advice everyone.
 
Wow in this case you better look for something less hazardous. Think of harm reduction... Tiny splashes can spread multiple doses on your table or face so ;)

I believe recrystallisation can be a splendid purification method when carried out by an experienced chemist. The idea is to get a hot, nearly saturated solution of unpure substance, filter out residual solids, then let cool to get crystals of better purity while minor constituents (impurities) stay in solution. Filter crystals out and wash with cold solvent. This way substances can be purified enough to obtain clean spectra. Just to clear this up.
 
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