... 1.98±0.05 Main Applications: Mainly for ion membrane caustic soda,hydrogen-oxygen fuel cells,electrodialysis,desalination, water ... electrolysis. Package,Transportation and storage:Perfluorosulfonic acid proton exchange membrane is packed in circular paper barrels,every barrel attached ... trademark,brand,lot no.Perfluorosulfonic acid proton exchange membrane should be stored in clean and dry places, ...