Sorbic acid
Sorbic Acid
This preservative is originally from the fruit of the mountain ash tree (Sorbus Aucupuria). It inhibits the growth of fungi, thus extending the shelf life of cosmetics and food products and is considered to be well tolerated and safe.
see. Heike Käser 2010 "Natural Cosmetic Raw Materials", Linz, Freya Verlag, 3rd Edition 2012