Appendix 2: Alternatives to PFOS, their occurrence and applications List of alternatives to PFOS, its salts and PFOSF by applications Applications Open Use status Priority action Identified alternatives CAS No: Source of information Class application (assessment Highest action result) priority? Possible to replace PFOS technically? Acceptable purposes Photo-imaging No A shift to digital No Telomer-based products of various N/A UNEP/POPS/POPRC.9/INF/11/Rev.1 N/A techniques has perfluoroalkyl chain length C3- and Yes reduced the use compounds. drastically. Hydrocarbon surfactants N/A UNEP/POPS/POPRC.9/INF/11/Rev.1 N/A Silicon products N/A UNEP/POPS/POPRC.9/INF/11/Rev.1 N/A Non chemical: N/A UNEP/POPS/POPRC.9/INF/11/Rev.1 N/A Digital techniques Photoresist and No PFOS is still No Fluorinated compounds are in use. N/A UNEP/POPS/POPRC.9/INF/11/Rev.1 N/A anti-reflective used but in Not possible to coatings for lower answer without semiconductors concentrations. detailed chemicals information about the alternatives Etching agent for No PFOS is still No Short-chain perfluoroalkyl sulfonates N/A UNEP/POPS/POPRC.9/INF/11/Rev.1 N/A compound used but in Not possible to semiconductors lower answer without and ceramic filters concentrations. detailed chemicals information about the alternatives
Appendix 2: Alternatives to PFOS, their occurrence and applications List of alternatives to PFOS, its salts and PFOSF by applications Applications Open application Use status Priority action Highest action priority? Possible to replace PFOS technically? Identified alternatives CAS No: Source of information Class (assessment result) Acceptable purposes Photo-imaging No A shift to digital techniques has reduced the use drastically. No Yes Telomer-based products of various perfluoroalkyl chain length C3- and compounds. N/A UNEP/POPS/POPRC.9/INF/11/Rev.1 N/A Hydrocarbon surfactants N/A UNEP/POPS/POPRC.9/INF/11/Rev.1 N/A Silicon products N/A UNEP/POPS/POPRC.9/INF/11/Rev.1 N/A Non chemical: Digital techniques N/A UNEP/POPS/POPRC.9/INF/11/Rev.1 N/A Photoresist and anti-reflective coatings for semiconductors No PFOS is still used but in lower concentrations. No Not possible to answer without detailed chemicals information about the alternatives Fluorinated compounds are in use. N/A UNEP/POPS/POPRC.9/INF/11/Rev.1 N/A Etching agent for compound semiconductors and ceramic filters No PFOS is still used but in lower concentrations. No Not possible to answer without detailed chemicals information about the alternatives Short-chain perfluoroalkyl sulfonates N/A UNEP/POPS/POPRC.9/INF/11/Rev.1 N/A