What The Heck Is This Stuff?

I'm installing some new gauges for my nitrous/fuel systems and took my nitrous filter apart. I've maybe had the bottle open 3-5 times, and made 3-4 pulls on the dyno with it so far...

WTF is this stuff?

"Stuff" in Nitrous Filter (http://my.starstream.net/beccruice/Nitrous%20Powder/Nitrous%20Powder%20Small.JPG)

"Stuff" I Scraped Out Of Nitrous Filter (http://my.starstream.net/beccruice/Nitrous%20Powder/Nitrous%20Power%20Stick%20Small.JPG)

Close up of "Stuff" I scraped out of Nitrous Filter... (http://my.starstream.net/beccruice/Nitrous%20Powder/Nitrous%20Powder%20Close%20Up%20Small.JPG)