When I was in high school in the 60s a directive was sent to all school chemistry teachers to dilute and dispose of a certain chemical (mixture probably). They were told that it could become explosive with age.
The chemistry teacher mentioned it to the head of the rifle team figuring that he was knowledgeable with things that go bang. Neither thought that it could be all that explosive. After all, they were still using it in class.
So they took the bottle out to the middle of the football field and went back a safe distance. The rifle team coach took aim, and BOOM. A 2 foot wide hole in the ground.
By the way, very old teargas becomes explosive too. If you happen to have any, please call the local police.
On the other hand, I loved chemistry. That was where I got my potassium nitrate to make my own firecrackers.
