Propylhexedrine freebase (what's in there) is quite basic.
ebola is right. what you need is called an acid extraction. It changes the freebase (which is NOT water soluble) into a salt(which IS water soluble). I dreamt I did this like 500 times
I also dreamt I was in a well ventilated room
i would take 3 of the cottons side by side, sprinkle 1cc of pool strength HCL acid evenly over them, followed by 3 tablespoons of distilled water, then squeeze out the water/propylhexedrine.hcl mixture, then evaporate the water in a pyrex dish over gentle heat like a hair dryer, or maybe in front of a big AC unit (which blows out extremely dry air) then scrape it up to get about a gram of fluffy sparkly white powder that burns like hell when you snort it, but blasts damn well
IMPORTANT: make sure ALL the water is evaporated. DONT RUSH
youre probably thinking...Hydrochloric acid?!!?? no way!!! but remember, theres HCL acid in your stomach, and HCL in damn near every medication youve ever taken. Its the cheapest/easiest way to turn a non-water soluble alkaloid into a water soluble salt. And as long as you evap all the water, any excess HCL will drift away as a gas
if you go the heat route, be careful, as it doesnt take much heat to turn the stuff brown, and I dont know how much heat it takes to degrade the stuff
But it would be better to turn the stuff brown than to leave any liquid behind.
I recommend parachuting, because if you left any acid at all behind, it would be bad to use a needle.