absolutely love that you brought attention to recrystallisation, it is a great practice, i did so on my raws (92% purity test) a while back (on the recommendation of one of my buddies who is studying chemistry rn) it worked wonders (however the yield was a bit more than what you said in your post)
Yeah man, recrystallization’s honestly a game-changer, but the yield can take a hit if you don’t dial it in just right. I ran into the same issue before, so here’s what I’ve figured out through trial and error.
So first off, you gotta make sure your acetone is clean and dry — like really dry. I dried mine with Epsom salt I baked in the oven, then let it sit with the acetone in a sealed jar for a few hours. That part alone helped a lot with consistency. And don’t just dump a bunch of acetone in — you want to use the smallest amount possible to dissolve everything. I heat it just under the boiling point, around 50 to 55°C, and I keep it moving while it’s dissolving the tren. You’ll notice the color change, usually dark amber if it's tren, and once it’s fully clear with no floaters, that’s when I know it’s ready to filter.
Then I run it hot through my vacuum filter setup — it makes a huge difference. Even if you’re just using coffee filters for now, make sure everything’s pre-heated or at least not freezing cold. Once filtered, I move the liquid to a clean beaker and just let it sit at room temp for a few hours. No fridge yet, just let it do its thing. After that, I chill it in the fridge, not the freezer, for maybe six hours or more.
Now here’s the part I think a lot of people miss: after it’s sat in the fridge and you start seeing crystals form, I’ll pour in a little bit of ice-cold distilled water. Like 5 to 10 ml max. Not a ton. I chill the water in the freezer before using it. Pour it in gently, don’t stir like crazy. If I do stir, it’s only the liquid part, slowly with a glass rod. Once that goes in, I let it sit in the fridge again and then finish it off in the freezer overnight.
By the next morning, I’ll usually have a thick layer of crystals stuck to the bottom of the beaker. At that point, I filter again, using ice-cold acetone to wash the top of the cake — only a little bit, just enough to get off any residue or surface impurities. You don’t want to redissolve anything.
And don’t toss the leftover acetone. It still holds a lot of tren. I run it through the same exact process again — chill it, crash it, freeze it — and I usually pull out another 20–30% that way.
Last thing: if your yield’s still low, it’s probably either too much solvent, too fast of a cool-down, or your acetone’s picking up water. Any of those will kill your crystals. Took me a few rounds to figure that out.
But do you expect a loss of product.... I mean, if you're starting with something impure, you're going to lose a lot anyways.... But as long as you do what I just said and you rinse until you get as much as you can out of it, you can be certain you're gonna have a much better product.