The quality or capacity of a substance to be separated or purified by dialysis, a process that allows small molecules to pass through a membrane while blocking larger ones.
From 'dialysable' (capable of being dialyzed) + '-ity' (noun-forming suffix indicating a state or quality). Ultimately from Greek 'dialyein' (to separate, dissolve), from 'dia-' (through) + 'lyein' (to loosen).
Kidney disease patients depend on dialysis working—the dialysability of urea and other wastes is literally the difference between life and death, making this invisible chemical property one of medicine's most critical practical concerns.
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