Description: The Chemical Data Reporting (CDR) rule under the Toxic Substances Control Act (TSCA), requires manufacturers (including importers) to provide EPA with information on the production and use of chemicals in commerce.
Under the CDR rule, EPA collects basic exposure-related information including information on the types, quantities and uses of chemical substances produced domestically and imported into the United States. The CDR database constitutes the most comprehensive source of basic screening-level, exposure-related information on chemicals available to EPA, and is used by the Agency to protect the public from potential chemical risks.
The information is collected every four years from manufacturers (including importers) of certain chemicals in commerce generally when production volumes for the chemical are 25,000 lbs or greater for a specific reporting year. Collecting the information every four years assures that EPA and (for non-confidential data) the public have access to up-to-date information on chemicals.
The CDR rule is required by section 8(a) of the Toxic Substances Control Act (TSCA) and was formerly known as the Inventory Update Rule (IUR).
The CDR2020 data are accessible from the Access CDR Data page. The dataset registered here is for the set of chemicals with CAS Registry Numbers and excludes the ~600 chemicals without CASRNs and/or flagged as provisional. (Last Updated 9/16/2022)

Number of Chemicals: 8033