Calcium propionate (Food grade) Purity 99% min Calcium propionate is a new type of food additive . It is a safe and reliable antifungal agent forfood and feed approved by the World Health Organization ( WHO ) and the United Nations Foodand Agriculture Organization ( FAO ) . Calcium propionate has a wide range of antibacterialeffects on molds , yeasts and bacteria . It is harmful , harmless to humans and animals , and has notoxic side effects