EPA Sets Format of New Unique Identifiers for Confidential TSCA Chemicals

The Environmental Protection Agency is set to create a new system of unique identifiers for Toxic Substances Control Act chemical substances for which a request for confidentiality has been granted, it said in a notice. The unique identifiers (UID) will take the format UID-YEAR-XXXXXX, where year represents the year a confidentiality claim was asserted and XXXXXX is the number assigned to the UID. The identifier will appear everywhere the confidential chemical is referenced in EPA documents, except for when putting that number in a non-confidential document would enable the public to identify the chemical. EPA anticipates creating its first annual list of unique identifiers in November 2018.