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WASHINGTON, June 27, 2019 � Old-school gunpowder is really called “black powder,� and it was so crucial to the Revolutionary War effort that early Americans went to great (and gross) lengths to make it. This week on Reactions, find out what exactly those lengths were: .

Reactions is a video series produced by the American Chemical Öйú365betÖÐÎĹÙÍø and PBS Digital Studios. Subscribe to Reactions at and follow us on Twitter . For more of the latest research news, journalists and public information officers are encouraged to apply for for the ACS fall 2019 national meeting in San Diego.

The American Chemical Öйú365betÖÐÎĹÙÍø, the world’s largest scientific society, is a not-for-profit organization chartered by the U.S. Congress. ACS is a global leader in providing access to chemistry-related information and research through its multiple databases, peer-reviewed journals and scientific conferences. ACS does not conduct research, but publishes and publicizes peer-reviewed scientific studies. Its main offices are in Washington, D.C., and Columbus, Ohio.