Potassium Sorbate And Sodium Benzoate

Potassium sorbate is the potassium salt of sorbic acid, and sodium benzoate is the sodium salt of benzoic acid. Both are typically produced synthetically for use in food, though their parent acids can be found naturally in some plants.

These compounds are added to foods as preservatives to prevent the growth of mold, yeast, and bacteria, thereby extending shelf life. They are commonly found in acidic products such as ketchup, mustard, BBQ sauces, salad dressings, and some beverages.

Both potassium sorbate and sodium benzoate are generally recognized as safe (GRAS) by the FDA for use in food. JECFA has evaluated both ingredients and set acceptable daily intakes. When sodium benzoate is combined with ascorbic acid (Vitamin C) in certain conditions, it can form small amounts of benzene. The FDA has investigated this issue and continues to monitor levels in products. There have also been mixed findings in research regarding a potential link between sodium benzoate, especially when combined with certain artificial colors, and hyperactivity in some children; the FDA continues to monitor this research.