Choline Carboxylate Surfactants: Biocompatible and Highly Soluble in Water,

Regina Klein, Didier Touraud, and Werner Kunz,

Green Chemistry  10(4)  (2008)  433-435.

Abstract

With choline as a beneficial counterion of biol. origin, long-chain carboxylates become water sol. at room temp.
(c) 2008 Berger Georg