1923 Dynamite in Chile

Since the late 19th century, Chile had been a key source of sodium nitrate used in the "B" blasting powder developed by Lammot du Pont. By 1927 the development of synthetic ammonia removed the industry’s need for Chilean nitrates, and mining operations were cut back. Despite this reduced demand, Compania Sud-Americana de Explosivos continued to supply explosives to the Chilean market through World War II. In 1967 DuPont absorbed the company as a consolidated subsidiary and renamed it Industrias Quimicas DuPont S.A. DuPont sold its operations at Rio Loa in 1971 after lengthy negotiations with the Chilean government.