EU Regulates PFHxS & PFHxS-related Compounds Under POP Recast

August 30, 2023

The EU has added PFHxS, its salts and PFHxS-related compounds to the POP Recast Regulation on persistent organic pollutants. The latest amendment will become effective on August 28, 2023.

On August 8, 2023, the European Union (EU) issued Regulation (EU) 2023/1608 to amend Part A of Annex I to Regulation (EU) 2019/1021 on persistent organic pollutants (POP Recast Regulation, consolidated version to June 2023) by adding perfluorohexane sulfonic acid (PFHxS), its salts and PFHxS-related compounds, with specific exemptions on intermediate use or other specifications.

According to the definitions in the latest amendment, PFHxS, its salts and PFHxS-related compounds means:

PFHxS, including any of its branched isomers
Its salts
PFHxS-related compounds, which are substances that degrade to PFHxS, including substances that contain the chemical moiety C6F13S- as one of its structural elements

Highlights of the new law are summarized in Table 1.

Commission Delegated Regulation (EU) 2023/1608 of May 30, 2023, amending Annex I to Regulation (EU) 2019/1021 as regards the listing of perfluorohexane sulfonic acid (PFHxS), its salts and PFHxS-related compounds, Official Journal of the EU, August 8, 2023

Substance	Scope	Specific exemption on intermediate use or other specification	Effective Date
PFHxS and its salts	Substances, mixtures or articles	≤ 0.025 mg/kg	August 28, 2023
PFHxS-related Compounds	Substances, mixtures or articles	≤ 1 mg/kg (sum of all PFHxS-related compounds)
PFHxS, its salts and PFHxS-related compounds	Concentrated firefighting foam mixtures that are to be used or are used in the manufacture of other firefighting foam mixtures	≤ 0.1 mg/kg (to be reviewed within three years with a view to strengthen the limit)

Table 1

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