I don’t know what/why the line is full of this powder, but every spool I’ve ever installed has this. I’ve got it on several reels and really like the stuff.
The powder is part of the coating on the line dont worry that is normal for a new spool of line you should like it very well hopefully you put some backing on and if you are going to use worm hooks with it pick up some super glue to fill the hook gaps in with Keep a tight line buzzer