Not sure mate just do evap test and check Pyrex for residue.
I don't know why there would be flakes so unless it had DMT and it just started freezing out but wouldn't know otherwise if it was new just do the test good luck.
"PSYCHEDELIC DRUGS DON'T CHANGE YOU- THEY DON'T CHANGE YOUR CHARACTER-UNLESS YOU WANT TO BE CHANGED THEY ENABLE CHANGE THEY CAN'T IMPOSE IT...."
-ALEXANDER SHULGIN
It's time to move on to the next step in the psychedelic revolution