Pierce has developed the Slide-A-Lyzer® Dialysis Cassette as a convenient means for dialyzing samples. Low molecular weight contaminant removal, buffer exchange, desalting and concentration can be accomplished with this device. The Slide-A-Lyzer® Dialysis Cassette is made of low-binding regenerated cellulose and features a hermetically sealed sample chamber to maintain the highest possible sample integrity. Also, the Slide-A-Lyzer® Dialysis Cassette is manufactured under clean room conditions to ensure that the unit is free of contaminants. Sample introduction and removal are easily accomplished by penetrating the gasket with a hypodermic needle attached to asyringe. The gasket imparts resealability to the needle puncture, ensuring that no sample is lost from the Cassette during dialysis.