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The Chemical Data Reporting (CDR) rule, under the TSCA, requires manufacturers (including importers) to provide EPA with information on the production and use of chemicals in commerce in large quantities (6).

Under the CDR rule, EPA collects basic exposure‐related information on the types, quantities and uses of chemical substances produced domestically and imported into the United States. It constitutes the most comprehensive source of basic screening level and 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 pounds 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 that are produced in large quantities.

The CDR rule is required by section 8(a) of the TSCA, and was formerly known as the Inventory Update Rule (IUR).

Read the TSCA CDR requirements in the Code of Federal Regulations (40 CFR Part 711).