Nitroglycerin is the explosive described and used throughout Fight Club. Tyler describes to The Narrator how to make the explosive in both the book and film. In the book the instructions Tyler gives for making it are as follows. You take a 98% concentration of fuming nitric-acid and add the acid to three times that amount of sulphuric acid, do this in an ice-bath, then add glycerine drop-by-drop with an eye-dropper and you have nitroglycerin.