Sodium Benzoate And Citric Acid As Preservatives

Sodium benzoate is a salt of benzoic acid, a widely used food preservative. It is produced synthetically from toluene, a byproduct of petroleum refining. Citric acid is a weak organic acid naturally found in citrus fruits, but it is typically produced commercially through the fermentation of sugar by specific molds.

This combination is often used as a preservative in acidic foods like jams, jellies, salad dressings, and carbonated drinks. Citric acid lowers the pH of the food, creating an environment where sodium benzoate is more effective at inhibiting the growth of mold, yeast, and bacteria, thus extending shelf life.

In the U.S., both sodium benzoate and citric acid are generally recognized as safe (GRAS) by the FDA when used as preservatives. When consumed in typical amounts found in food, they are not associated with adverse health effects. Both substances have been evaluated by international bodies like JECFA and EFSA. Some studies have explored potential links between sodium benzoate and hyperactivity in children, but the evidence is mixed and not conclusive.