DuPont Company Repauno Works manufactured high-explosive dynamite. The company began as the Repauno Chemical Company on June 7, 1880, by Lammot du Pont (1831-1884), a chemist working for the family business, E.I. du Pont de Nemours & Company, a chemical company that originally produced gunpowder. In 1980, the Repauno Works celebrated its centennial anniversary. This small collection contains materials generated in the process of organizing the centennial celebration of the Repauno Works.