Sodium Is an essential aspect for all animals and some vegetation. Sodium ions are the major cation while in the extracellular fluid (ECF) and therefore are the key contributor to the ECF osmotic strain.[8] Animal cells actively pump sodium ions out on the cells by means of the sodium–potassium pump, https://www.tjcyindustrialchem.com/news/sodium-chlorite-uses-and-the-difference-from-chlorine.html