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Aquivion® D79-25BS-Li

liquid dispersion, 25% in water, PFSLi eq. wt. 790 g/mole SO3Li, stabilized CF3 polymer chain ends

Aquivion® SO3Li, Tetrafluoroethylene-perfluoro(3-oxa-4-pentenesulfonic acid) copolymer, Ethanesulfonic acid
Linear Formula:
(C4F7SO4Li)x . (C2F4)y
CAS Number:

Quality Level



eq. wt.

790 g/eq±20 g/eq SO3Li


25 wt. % in water

General description

Aquivion® D79-25BS-Li is a dispersion based on the short-side-chain (SSC) copolymer of Tetrafluoroethylene and the Sulfonyl Fluoride Vinyl Ether (SFVE) CF2=CF2-O-(CF2)2-SO2F industrially produced by Solvay Specialty Polymers. The resulting perfluoropolymer′s functional groups are in their lithium sulfonate form, SO3Li. Aquivion® D79-25BS-Li is delivered as a colloidal dispersion in highly pure deionized water. It contains the perfluoropolymer′s neutral lithium salt form (R-SO3Li) of low equivalent weight (EW) 790 g/mole SO3H at very high solid content of 25 % by weight which allows a large variety of subsequent formulations without additional pre-concentration steps. D79-25BS-Li contains "chemically stabilized" perfluoropolymer in which a large amount of polymer end groups are converted to their inert "CF3" configuration.


Once formulated with solvents Aquivion® D79-25BS-Li can be used for the preparation of cast films or membranes, of coatings on various substrates. Formulations with volatile and non-volatile additives to make components for electrochemical devices are another possible way of using D79-25BS-Li.


25 mL in glass bottle

Preparation Note

Store product near room temperature and keep away from sources of radiation (UV, IR) or ignition. Do not freeze. Agitate and eventually sonicate prior to use.

Legal Information

Aquivion is a registered trademark of Solvay Group

Storage Class Code

10 - Combustible liquids



Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis

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Certificate of Origin

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