Benzoic acid and sodium benzoate are widely used as preservatives in food processing and preservation and are limited in some foods in some countries. As in food, benzoic acid can play a role in the Free State, so the effect is better in strong acid food. Benzoic acid is commonly used in carbonated beverages, soy sauce, sauces, preserves and fruit and vegetable beverages, and benzoic acid can be used together with P-hydroxybenzoate in soy sauce and beverages. Benzoic acid and sodium benzoate are often used in the preservation of high acidity fruit, jam, beverage syrup memory other acidic food, can be combined with low-temperature sterilization, play a synergistic role.
Benzoic acid and sodium benzoate are generally limited to foods with higher protein content. The effect of sodium benzoate on microorganisms is the same as that of benzoic acid, which is 1.2 times times as much as that of benzoic acid because it is sodium salt.