my first 2 pull xylene color is open yellow and it looks clean
but the other 2 pull the solvent change color more darker which i understand it is dirty
i did not shake it much
and do fasa to get the crystals
the question is how can i clean the solvent from the unwanted dirty part
i put it in the refregirator and wait a few days there is some dirt at the bottom but not enough
when i put a little fasa and wait then more dirt appear how can i seperate my solvent from pulled dirt and the crystals.

if you add FASA, there will be some alkaloids precipitating. Maybe just completely add FASA now to precipitate all your fumarates, then wash your fumarates with dry acetone or IPA to clean it up further.

i discover that if you put a few fasa to the solvent then it gives the dirt to the bottom before it start giving crystalls
first you just put some fasa and wait and filter the solvent then do it again and filter now you have clean open yellow color solvent without dirt now you can put enough fasa to get the crystals. i tried it and worked for me

how did you test that the "dirt" isnt alkaloids at least in part ?

i can see it. it looks like dirt without crsytall. and if i put a few fasa in a clean solvent at the begining there is no crystalization. you have to put enough and than it starts giving crystalls. but a few fasa in a dirty solvent gives some dirt at the bottom in the begining. i am not sure maybe there are some active allkoloid in the dirt but it looks like just dirt.

after filtering dirt and then put some fasa and filter again i reach some open yellow color solvent.
and then i put lots of fasa and yet it reaches a level and it start givin crystalls. and after that time everydrop of fasa it gives more crystall.