It is a quaternary ammonium salt, consisting of choline cations ([(CH3)3NCH2CH2OH]+) and chloride anions (Cl−).
The cation of this salt, choline, occurs in nature in living beings.
[2] Choline chloride is a white, water-soluble salt used mainly in animal feed.
Choline chloride is mass-produced with world production estimated at 160 000 tons in 1999.
It forms a deep eutectic solvent with urea, ethylene glycol, glycerol, and many other compounds.