What is a food preservative Optiphen BD? In White Mandarin natural cosmetics is used Ecocert certified food preservative Optiphen BD — it is absolutely safe benzyl alcohol-based preservative (it is composed of Benzyl Alcohol, Benzoic Acid, Dehydroacetic Acid), which does not affect the human genetics. Benzyl alcohol is a component of many essential oils. He has a light almond scent. Benzoic acid is a simplest aromatic carboxylic acid, obtained for the first time in the 16th century from benzoin gum. It contains, for example, in berries such as cranberries and cowberries, and in the body of some animals. It is used in medicine for the treatment of skin diseases and is used as a safe acid solution food preservative. Dehydroacetic acid is a safe food preservative. Dehydroacetic acid, carboxylic acid and benzyl alcohol, nature-identical flavorings are used to increase shelf life of cosmetic products and allowed by European certification authorities as safe preservatives.