what are common preservatives used in foods?
Sodium benzoate. Sodium benzoate is a preservative used in acidic liquids such as vinegar, juices or soft drinks. It is also found in food products such as margarine and fast food hamburgers. Sodium benzoate is also used in fireworks and makes a great rocket fuel.Happy 4th of July! 8.odium benzoate is a preservative used in acidic liquids such as vinegar, juices or soft drinks. It is also found in food products such as margarine and fast food hamburgers. Sodium benzoate is also used in fireworks and makes a great rocket fuel. Happy 4th of July! 8.