Sodium benzoate is a preservative added to some sodas, packaged foods, and personal care products to prolong shelf life. Sodium benzoate is the first preservative the FDA allowed in foods and still a widely used food additive. It’s classified as Generally Recognized As Safe (GRAS), meaning that experts consider it safe when used as intended. Sodium benzoate inhibits the growth of potentially harmful bacteria, mold, and other microbes in food, thus deterring spoilage. It’s particularly effective in acidic food. Therefore, it’s commonly used in foods, such as soda, bottled lemon juice, pickles, jelly, salad dressing, soy sauce, and other condiments. It also has industrial uses. One of its biggest applications is to deter corrosion, such as in coolants for car engines