Hi there!

I followed 69Ron's tek to convert my freebase to fumarate to make pharma.
Dissolved 1g of pale yellow freebase in 40g 100% acetone.
Dissolved 310mg of fumaric acid in 40g acetone (with a heat bath because the acid wouldn't dissolve).
I mixed both. The solution was instantly cloudy, more orange than yellow.
I set to evap under a fan.
I came back an hour later, the solution was clear (not cloudy) and bright orange.
I assume the fan brought lots of H2O which dissolved the fumarate and cleared the cloudiness.
I let that sit one night without the fan, then a whole afternoon in a 30°C oven.
I ended up with the "jam" pictured.
Is this the expected result? Was the fan a bad idea?
Considering that I didn't start with goo, I didn't expect to end up with goo. ^^

Cheers!

Don't evap. Close or cover the mixing vessel and put in the refrigerator. After some hours to allow for full precipitation and crystallization, decant or filter.

The idea with this tek is that DMT fumarate is not soluble in dry acetone, while the surplus of fumaric acid is, and also any impurities in the DMT freebase. The DMT fumarate will crash out, while the rest stays in solution. When you evaporate the acetone, you will crash out the other stuff too, which defeats the purpose of the tek.

BTW, make sure your acetone is dry (anhydrous) and pure, at least to evaporation tests. Decant the acetone-DMT and acetone-fumaric acid solutions before mixing, so that the insoluble impurities do not end caught up in the DMT fumarate.

Good luck next time. You could still freebase the DMT fumarate and retry the whole operation.

OK thanks that makes more sense.
I'll try again then.
Why can't I let it dry completely, mix again with acetone, decant and separate ?

If I'm understanding you correctly, you could do that but it would require more time, effort, and acetone than the method described in the tek would.

Okidoki.
I'll update the thread if when I succeed.

You are right, that could also be done. Use ice-cold, dry and clean acetone, mix thoroughly in closed container (don't let the acetone soak up atmospheric moisture) and filter out the insoluble DMT fumarate.

It actually might be a bit less lossy than rebasing, but rebasing and salting could give a cleaner end result.

Thanks.
I tried ice-cold acetone. I had to stir my fumarate a lot to break the "lumps" down.
I ended up with powder this time, brick color (slightly paler than the bright red).
I'll try rebasing and salting now.