Fumasep FAS-30

Brand: FuMA-Tech
Product Code: 5041642

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Fumasep FAS-30 is a non-reinforced Anion Exchange Membrane (AEM) with very low resistance, high selectivity and high stability in pH acidic and basic environment.

Fumasep FAS-30 membrane comes in either a 10cm x 10cm or 20cm x 30cm size sheet. The membrane is the thin brown foil, delivered on a backing foil (colourless rigid PET foil). Pull off carefully the membrane (brown) from the backing foil. The membrane is delivered in dry form.

Fumatech membranes are highly sensitive to differences in humidity and moisture content. Therefore the membranes can vary +/- 0.5cm from the original cut sizes. Also due to this sensitivity the manufacturer expects wrinkles to form, however soaking the membranes in deionized water will return the membranes to the full size planar state according to the manufacturer.

Fumasep FAS-30 Features:

 • Applications: Electrodialysis for demineralisation, desalination, capacitive deionization and others.
 • Anion Exchange Membrane
 • Thickness: 30 micrometers (1.19 mil)
 • Sizes: 10cm x 10cm, 20cm x 30cm

Fumasep FAS-30 Technical Specification Sheet


Keep membrane package closed / sealed when unused. Unpack membrane only for direct use and process immediately after opening. Store, handle and process the membrane in a clean and dust-free area. Always wear protective gloves when handling the membrane. Handle with care, be sure not to puncture, crease or scratch the membrane, otherwise leaks will occur. All surfaces which may get into contact with the membrane during inspection, storage, pretreatment and mounting must be free of sharp edges or angles.


Dry Form: The membrane can be stored dry for an unlimited amount of time. However, the membrane has to be conditioned (washed and rinsed) prior to use.

Wet Form: Storage for short and medium time scale (hours up to several weeks) may be done in unsealed containers in 0.5 – 1.5 wt% NaCl solution or comparable neutral pH electrolytes. For storage over a longer time period a sealed container is recommended using afore said electrolyte with biocide to avoid biological fouling.

Pre-Treatment and Conditioning:

The membrane is delivered in bromide form and dry form. Depending on application and cell design, assembling is possible in dry form (without pretreatment) or wet form. For optimum performance it is recommended to rinse the membrane in NaCl solution (e.g. 0.5 M NaCl solution at 25°C for 24 hrs) to remove any additive from the membrane. Place the membrane sample between stabilizing meshes / spacers in order to avoid curling. Do not let the membrane dry out since micro-cracks may likely occur during shrinkage.

If you have any concerns about storage, chemical stability and pretreatment before proceeding, please feel free to contact us for further information.

Please note that a current lead time of one to two weeks is to be expected.

Membrane Properties
Membrane Anion Exchange Membrane
Thickness 25 - 35 µm (microns)
Appearance / Color Transparent / Brown
Backing Foil PET Foil
Delivery Form Dry
Reinforcement None
Tensile Strength - max. (MPa) 20 - 40 MPa
Density 3.5 - 4.4 mg•cm-2
Non-Std Modulus (MPa) 1200 - 1700 MPa
Yield Strength at 23°C / 50 % R.H. 25 - 40 MPa
Elongation to Break (%) 30 - 60 %
Specific Area Resistance 0.3 - 0.6 (in Cl- form) Ω•cm2
Specific Conductivity 3.0 - 7.0 (in Cl- form) mS•cm-1
Counter Ion Bromide (Br-)
Ion Exchange Capacity 1.6 - 2.0 meq•g-1
Selectivity 92 - 96 %
Uptake in H2O at 25°C 15 - 30 wt %
Dimensional Swelling in H2O at 25°C 0 - 2 %
Proton Transfer Rate 3000 - 4000 µmol•min-1•cm-2
Bubble Point Test in Water at 25°C > 2.5 bar

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