SVHC Advisory Notice


Perfluorohexane-1-sulfonic acid and its salts (PFHxS)

Perfluorohexane-1-sulfonic acid and its salts (PFHxS)

On 7 July 2017 - ECHA added Perfluorohexane sulfonic acid and its salts (PFHxS) to the Substances of Very High Concern List (SVHC).

They 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.

Perfluorohexane-1-sulfonic acid and its salts (PFHxS) are a known byproduct during production of Heptadecafluorooctane-1-sulphonic acid (PFOS).

PFHxS is used as a component of fire-fighting foam as well as water and stain protective coatings for carpets, paper and textiles. It has the same function as PFOS.

The safety focus of this substance concerns animal and human health with the main exposure coming via food and drinking water. The chemical accumulates in humans and is often present in the blood of the general population according to supporting information. Some studies also suggest that it may have more potential to build up (bioaccumulate) in humans than PFOS which has long been phased out in the EU and North America.                                      

HMC ensures through supplier audits and questionnaires that PFHxS is not intentionally used in the formulation of HMC products. We maintain close scrutiny for the possible presence of all chemicals listed in the Substances of Very High Concern that may be contained in raw materials.

It is the primary intention of HMC to only use raw materials which do not contain any listed Chemical Substances of Very High Concern. If you would like to check for the Substances of Very High Concern in relation to the HMC product used in your application, please download the relevant HMC RAPIDS document or contact HMC’s Regulatory Engineer at