Sodium Benzoate & Citric Acid As Preservatives

Sodium benzoate is the sodium salt of benzoic acid. Benzoic acid is found naturally in small amounts in many plants, such as cranberries and plums. It is typically manufactured industrially by reacting toluene with oxygen.

Sodium benzoate and citric acid are often used together as preservatives in packaged foods. They work by lowering the pH of the food and inhibiting the growth of mold, yeast, and bacteria, helping to extend shelf life. They are commonly found in baked goods like cakes, cupcakes, and snack cakes, as well as in pie fillings and cake mixes.

Sodium benzoate is Generally Recognized As Safe (GRAS) by the FDA when used as a food preservative. Citric acid is also GRAS. When combined, they can form small amounts of benzene, a carcinogen, under certain conditions (like exposure to heat or light), particularly in beverages. However, the levels of benzene formed are generally very low and not considered a health concern by regulatory bodies at typical consumption levels. Both substances have been evaluated by international bodies like JECFA, which has established acceptable daily intakes for benzoic acid and benzoates.