Sodium Benzoate And Potassium Sorbate Preservatives

Sodium benzoate and potassium sorbate are common food preservatives. Sodium benzoate is the sodium salt of benzoic acid, which occurs naturally in many plants like cranberries and apples. Potassium sorbate is the potassium salt of sorbic acid, which is produced industrially from chemicals like ketene and crotonaldehyde.

These preservatives prevent the growth of mold, yeast, and bacteria, extending the shelf life of foods. They are often used together in products with a lower pH (acidic), such as salad dressings, carbonated beverages, jams, and some dairy products.

Both sodium benzoate and potassium sorbate are approved for use in the U.S. by the FDA and are generally recognized as safe (GRAS). JECFA has evaluated both substances and established acceptable daily intakes. While generally considered safe at typical consumption levels, some studies have explored potential links between sodium benzoate and hyperactivity in children, though evidence is mixed and not conclusive. Concerns have also been raised about the formation of benzene when sodium benzoate is combined with ascorbic acid (Vitamin C) under certain conditions, though levels are typically very low.