Potassium (Potassium Sorbate)
Potassium sorbate (E 202) is made up of the potassium salt from sorbic acid and is used in cosmetics as well as in the food industry as a preservative. It is considered safe because it is metabolized in the human body into water and CO2. It protects cosmetic products from yeasts and moulds and is very friendly to the skin.
see. Heike Käser 2010 "Natural Cosmetic Raw Materials", Linz, Freya Verlag, 3rd Edition 2012