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Spectrum™ Spectra/Por™ 4 RC Dialysis Membrane Tubing 12,000 to 14,000 Dalton MWCO

Ideal for molecular separation, protein binding studies, electrolyte removal, desalting.

Supplier:  Spectrum™ S432700

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Catalog No. 08-667B

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Supplied as flat-width tubing or flat sheets that can be folded to fit various funnel-type dialysis apparatus.

Pure regenerated natural cellulose membranes with 1000 to 50,000 molecular weight cutoffs.


  • Transparent and flexible
  • Low molecular weight compounds in aqueous solutions diffuse through membrane
  • Higher molecular weights, such as proteins and bacteria, are retained by membrane
  • Glycerol preserves membrane and must be removed before use
  • Flat sheets and discs available for use with dialysis apparatus


Do not tie knots in tubing; use closures



Spectra/Por 4 Dialysis Tubing
Regenerated Cellulose
0.62 in.
30.5 m
39.2°F to 249.8°F
12 to 14 kD
16 mm
100 ft.
Packaged with glycerin
4°C to 121°C
Ideal for molecular separation, protein binding studies, electrolyte removal, desalting


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