Future availability of Neopan 400 in 120

[N467RX]

In some parts of Europe they sell something called Neopan 400CN, and it's C-41

 

[pentaxuser]

Just remind me. What is PFOS and where is this found in Neopan 400 that makes it unique to Neopan 400 120?

Clearly it isn't in Acros or any of Kodak's or Ilford's range of 120s. I cannot get my head around what it is that is banned and unique to Neopan 400 120 only.

pentaxuser