EPA groups Premanufacture Notice (PMN) chemicals with shared chemical and toxicological properties into chemical categories, enabling both PMN submitters and EPA reviewers to benefit from the accumulated data and past decisional precedents allowing reviews to be facilitated.

This page has New Chemicals Program's Chemical Categories Document, which explains how EPA uses the categories. 

• New Chemicals Program Chemical Categories Document (PDF)(157 pp, 488 K, August 2010)