The common name for the chemical compound NaCl is table salt. This ionic compound is composed of sodium (Na) and chloride (Cl) ions, and it is widely used as a seasoning and preservative in food. Beyond culinary applications, NaCl is essential for various biological functions, including maintaining electrolyte balance in the body. It plays a crucial role in nerve transmission and muscle function. Table salt has been used throughout history, not only as a flavor enhancer but also as a valuable commodity in trade.