NaCl, also known as sodium chloride, is a compound composed of sodium and chloride ions. It is a white crystalline solid that is commonly referred to as table salt. NaCl is not only a staple in our diets, but it also plays a crucial role in various biological processes. As an electrolyte, sodium chloride helps maintain the balance of fluids in our bodies and facilitates the transmission of electrical impulses in nerve cells. It is essential for proper muscle function and is involved in regulating blood pressure. Sodium chloride is widely used in food preparation, as a preservative, and in various industrial applications. Its versatility and importance make it one of the most commonly used compounds worldwide.