Poly(oxy-1,4-phenylenesulphonyl-1,4-phenyleneoxy-1,4-phenyleneisopropylidene-1,4-phenylene) (CAS RN 25135-51-7 and CAS RN  25154-01-2), in one of the forms mentioned in note 6(b) to this chapter containing by weight not more than 20 % of additives
Third country duty