Sodium Benzoate

Chemical preservatives are frequently used in processed foods to prevent growth of bacteria, yeast or other microorganisms. Sodium benzoate is a type of preservatives commonly used in the fruit pies, jams, beverages, salads, relishes and sauerkraut, typically foods that have an acidic pH. Sodium benzoate and water produce benzoic acid, which is the active form of the preservative. Benzoic acid is found naturally in some fruits such as cranberries, plums and apples.

The United States Food and Drug Administration has studied sodium benzoate extensively and found that it is safe when consumed in amounts found in normal diets. It would take approximately 90 times the amount of sodium benzoate found in a typical diet before any problems might occur.

Benzoates and Benzenes

Sodium benzoate is sometimes used as a preservative in soft drinks, along with ascorbic acid (vitamin C). With excessive heat exposure, the two additives may interact to form benzene, which is known to cause cancer. Low levels of benzene were detected in a variety of soft drinks in 2005, however all levels were far below 5 parts per billion, which was considered safe for humans.