Restriction

Why Is PFHxS Added to SVHC Candidate List

Little Pro on 2017-07-19 Views:  Update:2018-04-02

On 7 July 2017, ECHA added Perfluorohexane sulfonic acid and its salts (PFHxS) to SVHC listPFHxS is part of the group of Perfluorochemicals (PFCs). Other well-known members of PFCs include PFOS and PFOA, both of which have already been restricted under EU REACH regulation. PFHxS, PFOS and PFOA share similar chemical strucutre and uses (i.e, surface treatment agents for textiles,  paper, and furniture etc. for its excellent waterproofing and oil-resistance performance).

Substances Covered by PFHxS

PFHxS is not a single substance. ECHA has provided a non-exhaustive list of substance identifiers that are covered by PFHxS. 

Identifier Non-exhaustive list
EC No. 206-587-1, 223-393-2, 269-511-6, 274-462-9
CAS No. 355-46-4, 3871-99-6, 41184-65-0, 41242-12-0, 55120-77-9, 68259-08-5, 70136-72-0, 70225-16-0, 72033-41-1, 82382-12-5, 92011-17-1, 108427-54-9, 108427-55-0,144116-10-9, 153443-35-7, 189274-31-5, 202189-84-2, 213740-81-9, 341035-71-0, 341548-85-4, 350836-93-0, 421555-73-9, 421555-74-0, 425670-70-8, 866621-50-3, 910606-39-2, 911027-68-4, 911027-69-5, 928049-42-7, 1000597-52-3, 1187817-57-7, 1310480-24-0, 1310480-27-3, 1310480-28-4, 1329995-45-0, 1329995-69-8, 1462414-59-0

The picture below is the molecular structure of Perfluorohexane sulfonic acid.

PFHxS

Why Is PFHxS Added to SVHC Candidate List

Perfluorohexane-1-sulphonic acid and its salts (PFHxS) are identified as substances meeting the criteria of Article 57 (e) of Regulation (EC) 1907/2006 (REACH) as they are very persistent and very bioaccumulative (vPvB) in accordance with Annex XIII of the REACH Regulation. PFHxS have been detected in endangered species and the human blood of the general population. 

Reference

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