Quote Originally Posted by Mark Fisher View Post
I'm sure you folks know this, but I'd feel guilt if I didn't mention it....

If this stuff is sodium azide, it isn't exactly harmless....it is highly toxic and dangerous.
It is not. We are talking about: 4,4'-DIAZIDOSTILBENE-2,2'-DISULFONIC ACID DISODIUM SALT or CAS 2718-90-3, with this molecular formula. It's the same as the 'Hardener #3' used in the Ultrastable pigment papers.