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ELbowloh-
Ah yes, that was one of the ones we had to evacuate the classroom for.
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We made di-nitrotoluene in one of our lessons (no idea why, for curriculum reasons I think) and our teacher mentioned that it's a precursor to trinitrotoluene (TNT), but that the third NO2 was very difficult to get on.
He didn't mind us trying until he saw one of my mates furiously boiling the hell out of a tube of the stuff with about five bunsen burners aimed at it... no idea if there was any danger of us making it with that process, but a halt was called to proceedings
aggi
christianSpaceman
My old chemistry teacher was a bit of a character.
He always had home made fireworks in his pockets and more than once we had to evacuate the classroom after he'd not bothered using the fume cupboard to make poisonous gas.
One lesson he decided to demonstrate how powder could explode and blew a few ceiling tiles off making flour explode and then did the same with, for whatever reason, powdered dried mushrooms.