Aquivion® PW79S coarse, acid powder based on the short-side-chain (SSC) copolymer of Tetrafluoroethylene and the Sulfonyl Fluoride Vinyl Ether (SFVE) CF2=CF-O-(CF2)2-SO2F produced by Solvay. The resulting perfluoropolymer's functional groups are in their sulfonic acid form, SO3H. Aquivion® PW79S is chemically-stabilized (denoted by the S-suffix). Aquivion® PW79S is characterized by a low equivalent weight and a high ionic exchange capacity. It can be used as is under conditions where conventional exchange resins have shown insufficient chemical resistance. Due to its superacid functionality with many active groups, it can be used either directly or as an ingredient of composite structures active as a heterogeneous catalyst. This encompasses a wide range of organic syntheses and respective reaction mechanisms. It is insoluble in water, acid or bases and in most solvents unless extreme conditions are applied. Furthermore Aquivion® PW79S can be dissolved in some organic solvents to produce ion exchange capacity membrane. Proper organic solvents are dipolar aprotic such as N-ethyl-2-pyrrolidone (NEP) and dimethyl sulfoxide. To facilitate the dissolution, slightly increase the temperature to 50-60°C. Please visit for more information.


  • Global Business Unit
    Specialty Polymers
  • Brand
  • Synonyms


Segments Applications
Resource Efficiency Electricity Generation

Chemical categories

Chemical category Chemical family Chemical product
Specialty Polymers Perfluorosulfonic acid PFSA (Perfluorosulfonic acid)

Region of commercial availability

  • Asia / Pacific
  • Europe / Middle East / Africa
  • North America
Not available in Middle East/Africa

Download documentation for Aquivion® PW79S