Key takeaway
What This Development Means
The Stockholm Convention's scientific committee recommends removing PFOS exemptions for closed-loop hard-metal plating and certain firefighting foams. The recommendation is not binding and will go to COP-13 in 2027.
Have The Stockholm Convention PFOS Exemptions Already Been Removed?
No. The Persistent Organic Pollutants Review Committee has recommended removal, but the Conference of the Parties must consider and adopt any amendment. Existing Annex B controls and national implementing rules continue. A future decision would also need to specify how and when it becomes effective for Parties.
Which PFOS Uses Are Covered By The Recommendation?
The recommendation targets remaining specific exemptions for PFOS, its salts and PFOSF in closed-loop hard-metal plating systems and certain firefighting foams. It does not announce a universal PFAS ban. The separate PFOI use for producing PFOB for pharmaceutical applications was recommended for retention.
Source basis: Secretariat of the Basel, Rotterdam and Stockholm Conventions, POPRC-22 press release (28 September 2026)
The remaining Stockholm Convention exemptions for PFOS in closed-loop hard-metal plating and certain firefighting foams could be removed after the treaty's scientific committee concluded that they are no longer needed. The Persistent Organic Pollutants Review Committee reached the recommendation at its twenty-second meeting in Rome, held from 21 to 25 September 2026.
Stockholm Convention PFOS Exemptions Move Towards Removal
Perfluorooctane sulfonic acid, its salts and perfluorooctane sulfonyl fluoride have been listed in Annex B to the Stockholm Convention since 2009. Annex B restricts production and use while allowing specified acceptable purposes or exemptions. The committee's recommendation concerns the remaining specific exemptions for closed-loop hard-metal plating systems and certain firefighting foams.
No treaty amendment has been adopted. The Conference of the Parties will consider the recommendation at its thirteenth meeting in Panama City in 2027. Until Parties decide and any amendment becomes effective for them, current international controls and national implementing law remain the legal baseline.
No New PFOS Threshold Or Immediate Ban Applies
The committee did not set a new concentration limit, transition date or disposal rule in the press release. Businesses should not treat the recommendation as an immediate worldwide prohibition or assume that every fluorinated plating or foam product is within scope.
The affected chemistry is PFOS, its salts and PFOSF. These substances belong to the wider group of per- and polyfluoroalkyl substances and are persistent, capable of long-range environmental transport and associated with harm to health and ecosystems. Product identity, formulation and national exemption registration remain important.
The committee separately recommended retaining the exemption allowing perfluorooctyl iodide to be used to produce perfluorooctyl bromide for pharmaceutical applications. It found that no viable alternative had been identified. That conclusion concerns the separate Annex A listing for PFOA-related compounds and should not be conflated with the PFOS recommendation.
Implications For Plating And Fire-Safety Supply Chains
Hard-metal plating operators relying on a closed-loop PFOS use should confirm whether the relevant Party has registered the exemption and assess technically suitable alternatives. Fire services and industrial sites should identify legacy foam concentrates, fixed systems, mobile equipment, contaminated rinsate and waste-management routes.
Manufacturers and importers should preserve substance identity and concentration evidence. Distributors and downstream users should verify broad PFAS-free or fluorine-free claims before relying on them.
This outcome progresses beyond Foresight's POPRC-22 agenda coverage. The technical body has concluded that the exemptions are unnecessary, making removal at COP-13 a credible planning scenario even though it is not yet law.
Summary
POPRC recommends ending the two remaining PFOS exemptions for closed-loop hard-metal plating and certain firefighting foams. Operators should map current reliance and substitution lead times, while continuing to follow existing Annex B controls and national law until Parties make a decision in 2027.
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