Ammonium Chloride is a white crystalline salt with the chemical formula NH4Cl. It is commonly used in various applications, including as a food additive, in fertilizers, and in the production of batteries. This compound is soluble in water and has a slightly salty taste. In the laboratory, Ammonium Chloride is often used as a buffering agent to maintain pH levels in solutions. It can also be found in some cough medicines, where it acts as an expectorant to help clear mucus from the respiratory tract.