Cl-

Cl- refers to a chloride ion, which is a chlorine atom that has gained an extra electron, giving it a negative charge. It is a common negatively charged particle (anion) found in nature and biology. Chloride plays an essential role in maintaining fluid balance, transmitting nerve signals, and forming acids like hydrochloric acid in the stomach, aiding digestion. It is present in salts such as table salt (sodium chloride). Proper levels of chloride are important for overall health, and imbalances can affect hydration, nerve function, and blood pH.