PRIO has been updated to reflect the decisions of the Stockholm Convention

In May 2025, a decision was taken by the Parties to the Stockholm Convention to list two additional groups of substances and one substance on the list for global phase-out. As a result, we have updated the PRIO database.

The new substances are:

• Chlorpyrifos (CAS number: 2921-88-2, EC number: 220-864-4)
• Medium-chain chlorinated paraffins, MCCP (several CAS/EC numbers)
• Long-chain perfluorocarboxylic acids, their salts and related substances (several CAS/EC numbers)

Previously, Chlorpyrifos was covered in PRIO by the criterion for potential PBT/vPvB. We have now updated to PBT/vPvB in the database, at the priority level phase-out substance with the reference Stockholm Convention.

MCCPs (C14-C17) identified as SVHC substances and included in the candidate list in the REACH Regulation (EC No 1907/2006) have been included in the PRIO database before. We have now added additional MCCP substances with the reference Stockholm Convention.

Substances in the group of long-chain perfluorocarboxylic acids, their salts and related compounds are already included in the PRIO database as phase-out substances. When the convention's example list becomes available, we will add the reference Stockholm Convention to these substances in the database.

Read more about references to substances in PRIO External link.