studied the toxicity and cytotoxicity
of choline chloride (ChCl) based DESs with four hydrogen
bond donors including glycerine, ethylene glycol, triethylene glycol
and urea. It was found that there was no toxic effect for the tested
DESs. DESs are expected to serve as selective chemicals which may
have the potential to be destructive for certain types of cells, e.g.
any abnormal cells (tumor cells) and non-destructive for other
cells.