Sodium Is an essential factor for all animals plus some plants. Sodium ions are the most important cation in the extracellular fluid (ECF) and as a result are the foremost contributor towards the ECF osmotic strain.[eight] Animal cells actively pump sodium ions out from the cells via the sodium–potassium pump, https://www.tjcyindustrialchem.com/news/sodium-chlorite-uses-and-the-difference-from-chlorine.html