The Green Chemistry Assistant (GCA) is a collaborative project between St. Olaf College and the U.S. Environmental Protection Agency that allows analysis of chemical equations, reactions, and processes in terms of green chemistry, safety, and chemical hazards. Geared toward a broad range of users, the site focuses on single- or multi-step processes for which the balanced chemical equations are known. Concepts such as atom economy, theoretical yield, experimental atom economy, process mass efficiency, and E-factor are explained and are calculated based on balanced chemical equations and experimental quantities introduced by users.
Summary prepared, November 2005, by Bob Hanson, Department of Chemistry, St. Olaf College.
Hanson, R. M.; Campbell, P. R. Green Chemistry Assistant. http://fusion.stolaf.edu/ gca (accessed June 2011).