The Substance Registry System (SRS) provides information on substances and how they are represented in the Environmental Protection Agency (EPA) regulations and information systems.
Using the search below, you can query for substances by common identifiers, names, or alternate identifiers. Additional search capabilities are available on the Search page.
Please read the SoR Disclaimer for the Substance Registry System. The
Introduction and
Help pages provide information to assist in understanding and using the SRS.
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