Incorporated in 1912, Atlas Powder Company functioned as an independent explosives and chemicals company until 1971, when it was purchased by Imperial Chemical Industries Limited (U.K.) and became its American affiliate under the name ICI Americas, Inc. The collection consists of minutes, reports, and correspondence from Atlas in addition to both predecessor and subsidiary companies.

Frederick J. LeMaistre (1879-1944) was a chemical engineer employed by the E.I. du Pont de Nemours Powder Company at its Eastern Laboratory for fourteen years. This collection consists of ten volumes; seven are LeMaistre's laboratory notebooks documenting his work on nitrates, nitroglycerin, artificial silk (rayon), pyralin, and solvents. Also included are two souvenir logbooks of tours by the American Institute of Chemical Engineers and one Niagara Oil Company of Philadelphia cashbook.

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 which originally produced gunpowder. This collection of photographs includes numerous views of the buildings, facilities, employees, and plant operations and activities.