Freebase DMT N-oxide is somewhat of a pain to deal with. It’s a yellow oil that won’t crystallize. It can form after extraction and is often present in large amounts in the plant prior to extraction.
According to several sources, DMT N-oxide becomes DMT when vaporized. But some users say the effects are slightly different, so it could be that some of the DMT N-oxide vaporizes without conversion to DMT.
DMT N-oxide is insoluble in naphtha (or heptane), but soluble in water, ether, DCM, etc. If you’re plant material is old, chances are most of the DMT has oxidized into DMT N-oxide. If you’re using naphtha or heptane to extract the DMT, your yield will be very low because it won’t extract much DMT N-oxide.
Let’s say for example that chacruna leaves are used. This sometimes has lots of DMT N-oxide present. For example, in one case the alkaloid mix was 89% DMT-N-oxide and almost no DMT at all. If extracted using a naphtha based A/B extraction, you’ll end up with almost no DMT at all. The DMT-N-oxide would stay in the aqueous phase. In this case you want to either convert it back into DMT or extract it using a solvent like ether or DCM instead of naphtha.
To convert any N-oxide (such as DMT N-oxide) back into its parent freebase alkaloid, you mix it which water made pH 3 (by adding HCl acid, acetic acid, etc.) and excess zinc dust. Mix it continuously for up to 2 hours at room temperature for the conversion to be complete. The remaining zinc dust is filtered off. The pH is then adjusted to pH 9, and the freebase alkaloid is then extracted with a non-polar solvent leaving behind zinc hydroxide in the aqueous phase.
This DMT N-oxide to freebase DMT trick should be part of the initial extraction. After acidifying your extract, before doing a freebase extraction, simple add a lot of excess zinc dust and mix it for 2 hours. Then freebase your DMT and extract it into naphtha. This will greatly increase yields for most plants that contain large amounts of DMT N-oxide that would otherwise be lost in naphtha based extractions.
DMT N-oxide tends to form from DMT when exposed to air drying by a fan, especially in elevated heat. This will make your DMT yellowish and oily. If enough DMT N-oxide is present, you won’t be able to crystallize your DMT unless you freeze precipitate it in naphtha. Dissolving a mix of dry DMT and oily DMT N-oxide in a small amount of warm naphtha will cause the DMT N-oxide to sink to the bottom of the naphtha as yellow or brownish sticky goo. Mix the goo around in the naphtha to free the DMT from it. The DMT will dissolve in the naphtha and can be poured off with the naphtha, leaving behind the DMT N-oxide. Then the DMT can be placed in the freezer to crystallize in the naphtha. Don’t discard the DMT N-oxide goo! You can convert it back into DMT later once you get some zinc dust.
Might be interesting to try, if one had an abundance of oily goods that won't crystalize. Anybody know where to get zinc?