Used in fertilizers to provide nitrogen to crops, enhancing plant growth. Commonly applied in dry cell batteries as an electrolyte for conducting electricity. Employed in cleaning metal surfaces by removing oxides prior to soldering or galvanizing. Utilized in cough medicines as an expectorant to help loosen mucus in respiratory conditions. Also used in food as a dough conditioner and stabilizer in some baked goods. Frequently applied in laboratories as a reagent for various chemical tests and buffer preparations.