ammonium chloride

WordReference Random House Unabridged Dictionary of American English © 2025

ammo′nium chlo′ride, [Chem., Pharm.]

1. Chemistry a white, crystalline, water-soluble powder, NH₄Cl, which produces a cooling sensation on the tongue, used chiefly in the manufacture of dry cells, in electroplating, and in medicine as an expectorant. Also called sal ammoniac. 

• 1865–70

Collins Concise English Dictionary © HarperCollins Publishers::

ammonium chloride noun

1. a white soluble crystalline solid used chiefly as an electrolyte in dry batteries and as a mordant and soldering flux. Formula: NH₄Cl
   Also called: sal ammoniac