What chemist created a viscous, colorless liquid used in World War I? 
Frances Micklethwait: Frances Mary Gore Micklethwait (1867– 25 March 1950), was an English research chemist, among the first to study and seek an antidote to mustard gas during the First World War. Sulfur mustard:  Pure sulfur mustards are colorless, viscous liquids at room temperature.
i don't know