> i would think that just "methy ethyl ketone peroxide" would be > dangerous enough by itself! wouldn't that be a mono-propelant > to an extent? Peroxides in resin use are often dissolved in and moderated by phthalates so they're more of a combustion hazard. If you get the conditions wrong/right they can go bang. For example acetyl peroxide is shock sensitive, especially if it's allowed to get cold and cystallise. And we did periodic checks on the ether bottles for any formation of ether peroxide crystals. We never did find any at our branch but the other did and was evacuated and the fire brigade took advice from the army bomb squad And back to practical safety lessons - one mad bastard in the QC lab next door tried his hand, very successfully, at making ammonium tri-iodide. He put it all over the place - under mats, in keyholes and door catches. As soon as he got busted he was sacked on the spot. No ifs buts maybes, clear your desk, hurry up, bye-bye. Completely mental. A lab (and yard) full of solvents, hydrogen cyclinders, and assorted ugly stuff like flammable isocyanates, very very nasty chromic acid and he's planting mini-bombs. For a laugh _______________________________________________ http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist