Lynn L. Bergeson, “Isotope Fact Sheet Warrants a Close Look,” Chemical Processing, July 10, 2013.

The U.S. Environmental Protection Agency (EPA) recently released a fact sheet (www.epa.gov/oppt/newchems/pubs/isotopes.pdf) on reporting chemical substances that contain different isotopes of the same elements listed on the Toxic Substances Control Act (TSCA) Inventory. The document has enforcement consequences, so stakeholders should review it carefully. This column explains its significance.