Dehydroacetic Acid:

Dehydroacetic Acid is a fungicide and bactericide predominantly used as a preservative in cosmetics. It works by killing off and preventing the growth of microorganisms that contribute to a product's decay.

Can be found in the following O Naturals Products: Nourishing Watermelon & Vitamin C Gel Face Mask, Anti-Aging Kiwi & Vitamin E Gel Face Mask, Antioxidant Lemon & Vitamin B Face Mask