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Thermo Scientific™ Slide-A-Lyzer™ Dialysis Flasks, 20K MWCO, 250 mL

Facilitate simple and effective removal of buffer salts and small contaminants from proteins and other macromolecules in sample volumes up to 250mL.

Manufacturer:  Thermo Scientific™ 87763

Catalog No. PI87763

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Thermo Scientific™ Slide-A-Lyzer Dialysis Flasks facilitate simple and effective removal of buffer salts and small contaminants from proteins and other macromolecules in sample volumes up to 250mL.

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Slide-A-Lyzer Dialysis Flasks can be used to process sample volumes up to 250mL in 8 to 24 hours and are available in four molecular-weight cutoff (MWCO) varieties: 2K, 3.5K, 10K and 20K. The flask-style dialysis devices are very easy to use. Add and remove sample using a serological pipette or by directly pouring the sample through a wide screw-cap opening at the top of the flask. No knots or clips are needed to seal the units. Slide-A-Lyzer Dialysis Flasks are manufactured using clean room conditions and have low-protein binding regenerated cellulose membranes to ensure maximum sample recovery and sample purity. The dialysis flasks are available in distinct colors, corresponding to the pore size (MWCO) of the dialysis membrane: Purple (20,000 daltons), Orange (10,000 daltons), Pink (3500 daltons), and Blue (2000 daltons).


  • Easy to use

    – Simply pipette or pour sample into flask and begin dialysis

  • Fast dialysis

    – flat flask chamber with two membranes provides high surface-area to volume ratio, enabling dialysis of a 250mL sample in 8 hours to overnight

  • High recovery – rectangular flask design maximizes recovery of entire sample volume via opening at top of flask

  • Multiple molecular-weight cutoffs

    – select the membrane MWCO that best suits your sample's molecular weight

  • Color-coded frames – easily identify membrane pore size (MWCO) based on the frame color

Dialysis Membrane Specifications:

  • Composition: Regenerated-cellulose
  • Thickness: 0.9 to 1.2mil (22.5 to 3Glc mum)
  • Hydration Required Before Use: 30 seconds to 2 minutes
  • Glycerol Content: Trace (10K MWCO content is 21%)
  • Sulfur Content: 0.04 to 0.17%
  • Heavy metals Content: Trace

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Slide-A-Lyzer Dialysis Flasks, 20K MWCO, 250mL
Buffer Exchange, Protein
Cell Culture Flask (T75)
20 kDa
4 Flasks
Upon receipt store product at room temperature Product shipped at ambient temperature.
Cellulose Membrane, Dialysis
250 mL
Product Certifications


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