Sentence:  The mixture was then extracted with alkali and with <WSD>water</WSD> following which the carbon tetrachloride was distilled on a Vigreux column , a 25 % center cut being retained which was then degassed under vacuum in the presence of * * f . 
Meaning of the word marked with <WSD> tags:  binary compound that occurs at room temperature as a clear colorless odorless tasteless liquid; freezes into ice below 0 degrees centigrade and boils above 100 degrees centigrade; widely used as a solvent