Jarrett,
<<So, if I understand you correctly, its not toxic to
humans, and after firing it off in an enclosed space[cockpit].. we
don't have
to worry about not being able to breath?>>
It is not toxic up to a point.  I don't have the data infront of me at
the moment, but while something like 3-6% concentration will take care
of the fire.  The PIC can probably handle up to 15%.
Chris