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On 27 August 2026, the UK Health and Safety Executive (HSE) issued a notice announcing significant updates to the chemicals list under the GB Prior Informed Consent (PIC) Regulation. The new rules officially took effect on 28 August 2026.

Perfluorohexane sulfonic acid (PFHxS) is a highly surface-active perfluorinated compound with chemical properties similar to perfluorooctane sulfonic acid (PFOS). Following the ban on PFOS by the Stockholm Convention in 2009, PFHxS has been widely used as a substitute in various products. However, PFHxS is persistent in the environment, capable of long-range transport, and may cause developmental toxicity, neurotoxicity, hepatotoxicity, and reproductive toxicity. At the 10th Conference of the Parties to the Stockholm Convention (SC COP-10), PFHxS, its salts, and related compounds were listed in Annex A of the Convention for elimination, with no exemptions allowed.