Sodium Benzoate is one of the most widely used food preservatives in the world. Its use is in both food and soft drink products. Sodium Benzoate possesses antimicrobial and flavor characteristics.You can find it in margarine, syrups, pickles, preserves, jams, and jellies. Almost every diet soft drink and many fruit juices contain sodium benzoate. Sodium benzoate increases the acidity of soft drinks, which also increases the intensity of flavor you get from the high-fructose corn syrup.