Sodium benzoate is a kind of salt. It can be found in many foods, since it is used as a preservative. You may be able to taste sodium benzoate in foods to which it is added — approximately 75% of people can taste it. People who can taste sodium benzoate can describe it in different ways. Sodium benzoate helps preserve food because of its high levels of acid. It can eliminate bacteria, yeast and fungi that can cause disease or rot. 0.495% of the preservative part.