Cheddite

Cheddite is an explosive compound used as a primer for shotgun cartridges. It contains 90% potassium chlorate, 7% paraffin, 3% petroleum jelly, and traces of carbon black.

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Cheddite was also a fictional substance described in a comic science-fiction novel by Harry Harrison. It was made by irradiating Cheddar cheese, and enabled faster-than-light travel.