In formulation of an electrical conductive paste, which is used to stick some electrodes on patient’s skin to get and record electrophysiological signals, there is something called polyoxyethylene 20 sorbitol. what is it? I know polyoxyethylene 20 sorbitan, polyoxyethylene sorbitol and sorbitol, but what is polyoxyethylene 20 sorbitol? I'd appreciate it if you let me know. Other ingredients are: brij 58, glycerin, propylene glycol,..