The main application of ammonium chloride is as a nitrogen source in fertilizers
METALWORK- Ammonium chloride is used as a flux in preparing metals to be tin coated, galvanized or soldered
MEDICINE- Ammonium chloride is used as an expectorant in cough medicine. Ammonium chloride is used as a systemic acidifying agent in treatment of severe metabolic alkalosis, in oral acid loading test to diagnose distal renal tubular acidosis, to maintain the urine at an acid pH in the treatment of some urinary-tract disorders.
FOOD- In several countries, ammonium chloride, known as sal ammoniac, is used as food additive under the E number E510, commonly as a yeast nutrient in breadmaking. Ammonium chloride is used to spice up dark sweets called salty liquorice, in baking to give cookies a very crisp texture
IN LABORATORY- Ammonium chloride is used to produce low temperatures in cooling baths. Ammonium chloride solutions with ammonia are used as buffer solutions.