National Historic Chemical Landmarks

Welcome to the website of the American Chemical Society’s National Historic Chemical Landmarks program. Under this program, ACS grants Landmark status to seminal achievements in the history of the chemical sciences and provides a record of their contributions to chemistry and society in the U.S.

Chemists and chemistry have transformed our lives, from advancing medicine and industry to creating new products such as penicillin, plastics and much more. This site tells their stories.

Find a Landmark: Browse the Landmarks Directory