And RDX and trinitrotoulene and nitromethane and nitroglycerin and... lots. It's easy enough to distill that having controlled %'s is just PR.I thimpfks it is used in making gun cotton
I've dumped nitrate salts into hardware store HCl to etch metals. Dump nitrate salts into sulfuric acid and you can nitrate organics.
It's all very silly.