PFHxA is considered to be the final degradation end point of any substance containing the C6F13-moiety. Up to now it is not registered under REACH.
In early 2018, PFHxA was considered for inclusion in the list of substances of very high concern for authorization, but the possible inclusion was withdrawn at the end of 2018.
The motives for inclusion were that PFHxA would be carcinogenic, mutagenic, reprotoxic for human reproduction and would remain in the environment. PFHxA is now proposed for restriction.
Relevance And Impact to HVACR industry
C6 fluorocarbon is one of the additives used in the production of filter media and replaces C8
C6 fluorocarbon is one of the additives used in the production of filter media and replaces C8 whose use has been forbidden a few years ago.
Manufacturers integrating filters in their products and filter manufacturer may be affected because the properties of the filter medium may change if its chemical composition is modified.
The actual impact on the performance of filters is difficult to assess (pressure drop, dust holding capacity, repellence and changes to ratings). It is also not known if alternative chemicals would be available.
Request for support by Filtration and Separation Coalition
This coalition, composed of the companies Ahlstrom-Munksjö, Hollingsworth & Vose and Lydall, has been following the consultations over the past years.
Their concern is detailed in the document GEN – 1144.01.
Meeting and Recommended actions
The Eurovent Product Group ‘Air Filters’ (PG-FIL) is already looking into this issue and will meet on 10 September.
Manufacturers that integrate filters in their products and are knowledgeable on this aspect are recommended to provide input by 31 August to the PG-FIL Secretary.