NITROglycerin, where the three OHs (see image) have been replaced by nitrates (NO
3) is used for heart conditions since it is a vasodilator.
Glycerin, before making into nitroglycerin:
It's also a too-sensitive explosive. When mixed with various inert powders it forms dynamite, which is less sensitive. However, the fumes get to people who handle it routinely and since it is a vasodilator, it causes severe headaches. Its inventor was subject to these headaches.
Pure un-nitrated glycerin(e) is used as a skin emollient, and I guess, according to RKL, a lubricant for defecation.
I was wondering about "kosher" un-nitrated glycerin, though.
Terry