Propylhexedrine HCl crystals synthesis. Part 1 with pictures. I took 4/5 of a Benzedrex (172.8mg of PPX HCL, 140mg of PPX freebase) at 12:20pm. I'm making Propylhexedrine HCl with the final 1/5 of a Benzedrex (43.2mg of PPX HCl, 35mg of PPX freebase). I