Choline chloride is an important feed additive for chickens where it accelerates growth. It forms a deep eutectic solvent with urea, ethylene glycol, glycerol and many other compounds. Other commercial choline salts are choline hydroxide and choline bitartrate. In foodstuffs Choline chloride is often present as phosphatidylcholine. It is also used as a clay control additive in fluids used for hydraulic fracturing.